i. You went on a different day and it was colder.
ii. That dyno isn't accurate, it is overreading.
iii. there's no way you can get that figure from those mods
iv. It's DSG, so it's different
v. Mine's manual, so it's different
vi. People can bung the guy a tenner to let him change the settings.
vii. They don't like REVO/CC/APR/GIAC here and so deliberately give lower results to them
Good list of theories.
i. Temperature can make a difference based on the air density, but in most cases you would get more of an effect of this on the open road than on a RR as the flow of air is faster and more direct. Hot days of course the air temperature can be high to start with so will not cool as effectively on cars with a lesser core of IC. Larger the core more effective the cooling effect, even on cold days.
ii. That's a software issue, they all have different ways of calculating the data. It's still best to compare figures on the same day against a varied selection of cars. As long as the operator is setting it up right of course.
iii. I've heard of TFSi's making over 350hp with the same level of mods that you and I have, they can be mapped to deliver big numbers. The 362 figure initially I could of believed based on the mapping I know CC can be quite peaky, it was the torque figure that went along with it that had me scratching my head.
iv. Well it is different, its a completely different type of gearbox (Clarkson once called it Witchcraft)
Prosport didn't really convince me they had enough experience with it to get it running right. Didn't an S3 do a mad figure because the length of the rolling road was a bit out of balance too?
v. Again it is, but less so because you stick it in a gear and it stays put until someone grabs hold of the gear stick, pushes in the clutch and makes it go some where else.

Is DSG manual mode truly manual? Not sure why they were changing cogs in a run? I've no experience of a DSG box so if i need to be educated then let me know.

vi. Heard of this, and I'm sure some less unscrupulous places might even entertain it. They must be desperate to do it and it's kind of sad really.

vii. Same as above really, just find that kind of sad. Tends to be spread by off cuff comments by tuners though. If they have to do that to push their products above others then their products are not really worth a great deal in my opinion. I've never had an opinion of liking one product over an another and still don't. My last car was REVO'd and was fantastic, this one is APR and equally great fun.
We are all looking for the best figures, in most cases people can't see much further than their 'peak' figures. However I like to compare graphs and see where one car is making its power at what RPM range. To me it's how the power is across the rev band that is of most importance.