What kind of oil did you use? If you changed to a thinner oil, it could have an effect.
It is normal for an engine to consume more oil at higher speed and load. It may be excessive if it smokes, though. I probably wouldn't worry about it if it only does it under that specific set of operating conditions. Think about how often you execute that maneuver.
The trick is determining where it's coming from. The three most likely paths are valve stem seals, piston ring to bore interface, and crankcase breather system. As your valve stem seals, piston rings, and bore hone pattern wear the amount of oil that gets past them will increase. Blowby also goes up, which drives more carryover into the breather.
Democracy is two wolves and a lamb voting on what to have for lunch...
