I agree with the 4 posts above!
Lean back and do as the instructor tells you to, it will (or won't) make sense afterwards. But the guy has experience in training students. Don't fall into the "..but I used to do this differently!" - of course you did, you were flying a different aircraft.
And to John_Tullamarine:
I did exactly that: transition from a light type straight into the A320 cockpit. It was not that big of a deal to fly it, it is very stable, and for normal ops you don't even need that many buttons. Things changed going into the abnormals, though.
I found it much tougher to transition from A340 to a CRJ, taking evolution a step backwards, from an aircraft providing you with diagnosis to one that will only show symptoms - totally different way of thinking.