Nevertheless I think it was good that they changed Claudia into Jenny. It gave series 2 a good twist. I always thought Nick was so blunt sometimes because he first thought Jenny would be exactly like Claudia, but then he found out that she was different in character, had a fiance etc. and although he tried he couldn't stop admiring her too. And that was what he hated and so his remarks where some kind of defensive attitude because he wanted to tell himself that he wasn't attracted to her (and I'm sure, Nick liked what he saw in the episode with the dress :D).