Pitts - spot on!
Some aircraft will have "Runway Checks" listed in their FRCs, some elements of which can be done as you taxy onto the active, and some that must be done brakes-on as you're lined up pointing down the runway. However, I can't think of any GA type that has runway checks listed - it's all taken care of in one set - the pre-takeoffs. I can understand people wanting to leave certain items until they're just about to take-off, but they can easily be switched as you line up on the runway. As was said before, being sat static on the runway at a busy airfield, doing checks you could have easily done as you lined up, really is very poor form. In my humble opinion!
And as for everyone preaching airmanship .... get over yourselves guys! Sitting on the runway doing things you could've thought about before you got there is not good airmanship! You really should be able to check it's the correct runway and have a think about the wind and EFATO options before you enter the runway!