Personally i think stoners crew doesnt have as big an influence as it does with other riders, yes they are amazing, hats off too them,
But stoner has the raw ability to control a bike despite what it does underneath him, this is something that is pushed in dirt track / flat track where every lap the track changes and 1 line cant be used for an entire race (if you try this you will either find your self on the ground, or develop an ability to react as fast as the bike.
I think this is something that a lot of the european guys lack, they race road bikes from a very young age, which is a great advantage but they get very cought up in having the perfect set up..... so both wheels stay perfectly in line this is something i dont think stoner demands you can see this in the way he slides the bike every chance he gets)
.......I think i am rambling....... too many beers during origin (the aussies will understand) But the point i think im making is...
Yes stoners team is really really good, but even if they where the best there was i think stoners ability to ride what he is given (ah la 800cc duc) would negate the SLIGHT differences in his teams skills to that of say JB's.
As IMO JB is the best engineer the GP circuit has ever seen.