I think Megan's scene with Peggy when she snapped at her about what she said at the party, when she was actually pissed about Don's reaction to the party, was very Betty-ish.
Don's marrying Megan rings false to me - I could see him eventually marrying Megan, but not this fast. And I don't think it's going to last. They really don't know each other at all (I thought you wanted the white carpet - no I thought you wanted it) and partly because I think Megan is super manipulative. I wonder what the comment that she's a good actress means.
I loved Lane and Joan's scene. I love Joan's glasses. The subplot with Lane and the wallet felt weird to me.