I had the re050a on my old Jetta and they were fine. The thing is even when cold you can't just stamp on the go pedal and expect to get traction from the outset. Drive to the conditions and sensibly and you won't have any issues even on Bridgestones.
I'm beginning to think you work for Bridgestone. Or alternatively, drive everywhere at 10mph and have never had to make an emergency manoeuvre/braking on the Bridgestones.
I'm not talking about stamping on the go pedal, nor driving in a manner not in tune with conditions. Nor driving like a lair. Just everyday driving with the traffic flow.
For example, I had one ~40kmh, constant speed, emergency swerve manoeuvre to avoid another driver who decided they wanted my lane almost put me in a pole on RE030s due to their lack of turning and braking grip. Then there were the numerous take off's from a standstill uphill resulting in wheel tramp due to no traction. Or the relatively sedate take offs on level surfaces which had the traction control cutting in. In a variety of different cars I could go on for ages listing why these tyres are sh!te, for everyday, cold weather driving, but why bother. Bridgestones are fine.
And the funny thing is, the numerous different model Michelins and Conts I've used have not exhibited the Bridgestones' appalling cold weather performance.
But yeah, the Bridgestones are fine. 
re030s are not re050s or S001s. I don't drive everywhere at 10mph either but I've never felt unsafe with them. Yes you'll have slightly more grip in the cold with a Michelin or Goodyear or conti tyre but driving to the conditions of the road and surroundings probably has way more weight than just saying oh these tyres are terrible. It's a good job we've got hundreds of tyres to choose really isn't it 👍
Never had REO30A, but it's a fair assumption to make that they'll be poor in normal UK driving conditions and climate when the rest are. I've personally experienced:-
Potenza S001
Potenza RE050A
Turanza T001
Turanza T005
They all suffer the same shortfall.
"Driving to the conditions of the road and surroundings" means having to treat the car differently if its got Bridgestones on vs Conti 5, Michelin PS4 etc. You shouldn't need to treat the car differently because it's got Bridgestones on. For me, that highlights the shortcomings of the tyre on UK roads vs its peers. If you can't get safe levels of grip on a GTI with Bridgestones when you put your foot down a little (not driving like a nutter) then what's the point of having a GTI apart from the badge and equipment?
For me, binning the Bridgestones and getting something better on is the best £320 you can spend in modding your GTI or R rather than nursing the car for 2 years on average miles and then realising how much better the car is on different rubber in the last few months of ownership before you chop it in.. I got £210 for my set of Bridgestones on ebay vs a £320 spend on a set of PS4s. So the difference neddn't hit you hard in the pocket.
I know we all have different priorities for our money, but when you're prepared to spend £600 on a detail and ceramic coating but won't spend a few hundred quid on decent tyres, i'd do the tyres first, every single time.
Driving on Bridgestones is like driving on decent summer tyres in snow when everyone else is on winter tyres - extreme caution needed.
If only VW would take on customer feedback and act on it appropriately. I can only think that they're getting these tyres for a song!
Spot-on, monkeyhanger. This ^ exactly echos my thoughts and experiences.
As previously stated, and I repeat, I've had basically the same traction and grip issues on:
RE030;
RE040;
S001 (briefly - ditched them after 1 week from new);
and an older Bridgestone model the name of which I can't recall.
They all lacked traction and grip in the cold and wet.
Now I think of it - all the above were OEM fitment on a variety of new cars. It was once explained to me by someone in the tyre industry that Bridgestone dump tyres to manufacturers on the premise that a certain percentage of owners know no better and fit the same tyre again at inflated prices. Whether this is correct I don't know, but it could explain VW's love affair with Bridgerocks.
I just cannot understand putting up with tyres which so obviously limit enjoyment of the GTI. For what? A few dollars/pounds saved over how many years? Lunacy in my opinion. And false economy in terms of safety. Going from 1 week old S001 to PS4 cost me 2/3rds of stuff-all on change over for a large gain in safety and driving satisfaction. I call that a small amount of money well spent.
And I can now safely drive over 10 MPH.
