I've got a puff of smoke at startup identical to yours, TireFryer. It doesn't happen when the car's been sitting a long time (overnight), but I noticed it twice today while running errands (startup in a parking lot after a 15-20 minute drive).
It goes away quickly and smells like a mix of burned fuel and oil. No smoke any other time (cruising, idling, WOT). Only briefly at startup.
Engine has 7500 miles on it, turbo has 1500 miles. Just replaced all fluids & filters, and a new PCV and grommet from Kirban.
Anyone ever figure out the cause? Maybe the lack of exhaust valve seals? Would some new Champion heads fix that issue? (Good excuse to get some new heads!)