-The NSS is currently comparing students from a new, more-or-less experimental program that uses an airplane that flies 300+ KIAS to a well-established program (with plenty of solid gouge out there) that uses an airplane that flies 180KIAS with it fire-walled. One can definitely argue that the slower you go, the more time you have and, therefore, the easier things are. One can also argue that the T6B will prepare studs much better for jet advanced than a T34 would.
I don't know where you are in the program, but if you're doing 3 bills in the T-6 you're probably fucking something up. The only time I go faster than 200 KIAS is on course rules.
However, we DO get to wear a g-suit...so yes, the training MUST be geared towards making jet dudes.

I've heard (from many sources, including my onwing) that the T-6 is much easier to fly in some respects, harder in others. I don't think it really matters at this stage in the game whether we fly the T-6 or the Sopwith Camel, my helmet stays on fire dude.