My thoughts here (as Bradders has mentioned me) is that moving from DD to "big bikes" is not necessarily straightforward, but can work by adaptation, given time.
Obviously racing skills and techniques are portable, but having started racing in DD and then having raced 675s, 749s, 996s and soon a 848, I'd say not easily portable without thought and effort.
For me, I had so much more time on a DD bike to react and make racing decisions which you have far less of on a larger bike. On larger bikes, managing the throttle through and out of corners takes a lot more thought (risk averse) to prevent hi-siding, whereas on a DD bike, the throttle was more of a switch and the fear of hi-siding was virtually non-existant.
Or take a corner list Chris curve, or Corams, on a DD bike, you simply go flat out, on a bigger bike you're likely to have to meter the throttle and feel (sense?) how much throttle you can present and you need to go closer to the limit (risk?) to go as fast as you can (DD = 100% throttle is as fast as you can = less perceived risk).
Also, cornering on a DD bike is the fun part as they are so relatively slow in a straight line, no fun was to be had on the straights. It can be the opposite for bigger bikes.
And I too was the one on trackdays getting overtaken on the straights on my DD bike by litre monsters only to be passing them again going into a turn, but part of the fun of riding a larger capacity bike (at least on trackdays) is how blindingly fast they are. And on larger bikes, corners are just a way of getting to the next straight
In racing terms, this can mean you have a fast laptime, but actually become slower in the corners.
There's more grip from the tyres (at least compared to the older Diablos), potentially another 100bhp on tap, better suspension (perhaps), but this just means that you should go faster, not that you actually can or do.
You get to corners much faster than on a DD bike, so braking becomes more critical, you have to manage the throttle during and coming out of the corner much more than on a DD bike, and get to the next corner much quicker to do the same again!! - its more hectic.
DD is great, racing bigger bikes is great too, I think there's different styles to maximising either.
Tim