Neither Car nor Autocar tell us anything we don't know already.
I think the most telling criticism of the R is that AWD only kicks in when the extra traction is needed. But even when a significant amount of power is channeled to the rear wheels, it still feels predominantly like a FWD car. Which means that for most of the time you drive an R, the extra power is doing little more than compensating for the extra weight.
Nevertheless, Car concludes that the R is ultimately more capable than the GTI because it can put more of its power down more of the time. While the extra ponies are diluted by an additional 100 kgs of AWD hardware, the R seems to have an edge over the GTI that the R32 never had over the Mark V GTI, according to the same magazine.
In the end, the Golf R consistently gets 4 stars instead of 5 because of the price. What both articles seems to be trying to do is to send a coded message to VW: ease up on the prices, your badge cannot command the type of premium you insist on charging. I would be surprised if VW didn't offer discounts on the R before too long - unless they're really serious about only selling 250 or 500. If total sales of 250 is the maximum they can achieve with a £30K+ price tag, then I doubt they'll recoup the development costs.
So the $10,000 (£6,500) question is should I buy an R over a GTI? Hmmm. Tough one.
Very tempted to just get a GTI.