Romney was great, although his comedic timing could use a little refinement. A most telling line of his was when he said that the headlines would say: “Obama embraced by the Catholic church..... Romney dines with Rich People”. He knew exactly what Obama was looking for there and received... a tacit approval from the Catholic clergy and the photo-op that would help defuse the animosity built by his anti-catholic policies.!!
For a non comedian I thought his timing was very good. I would put that performance up with a typical Leno or Letterman monologue.