Doubt it. It's more likely that the production line was running, they had 2011 frames waiting for engines, and a pile of 2010 non-kicker engines waiting for frames. The two get married.
If you read your warranty you'll see that it states RE reserves the right to make changes to models at any time and will not be obligated to retrofit those changes to the existing models already out there.
We think of things in terms of model year but in actuality the production line is constantly evolving to fix defects, upgrade things, accommodate parts from different suppliers, etc. These things don't revolve around a model year, they happen when they happen and the production keeps flowing. I'm sure no one wonders if their throttle assembly or front brak switch came from a different supplier or changed spec slightly but the kicker is different. It's a very visible feature that many people have strong opinions on so we notice it.
Scott