What we've got here is an experiment that has shown to have a lot of potential. While Wolowitz has shown that he can be funny too, sans his lewd jokes, Sheldon has done his usual bit to make this a memorable installment.
I honestly didn't expect a Wolowitz-centric episode. We had a Raj-centric episode, that didn't work out well. But this one just pulled it off. Raj had a good share of lines this time, and he given us some funny scenes. Barring all the kissing and lovemaking, this one would go down as one of the best installments of this season.