This was a better episode than we have seen in a long while. Although the argument can be seen as an obvious one to start from Penny,it has been a long time coming, especially as Penny constantly sits in Sheldon's chair. The chemistry between the two actors, although not romantic is still there as they play well off each other and make the episode laugh out loud funny.
I still want Penny and Lenord to get together for real and hope that they don't pin a series 3 on the 'donkey and carrot' idea i.e. Penny and Lenord get together again in the last episode.
Overall, a good episode, again relying on Sheldon to move the show along but definitely in the right direction.