If Damon had actually tried to kiss the real Elena and not Katherine, do you think she would have rejected him or done exactly what katherine did??

Reject him, she cares for Damon as a friend and she just told Stefan how much she loved him. i don't think she would have kissed Damon

I am a hardcore DE shipper but I do think she would have pulled back if he had tried to kiss her at this point. She's still too blinded by Stefan right now. I think she would have allowed the cheek kiss but nothing more than that ... YET.
But Season 2 is going to be about Elena starting to return Damon's feelings and I think something will happen with Stefan (probably involving Katherine) and Damon will also likely do something for Elena that will all come together and make her realize the feelings she has for him that she is denying. Maybe the shift in her brain even happens when she finds out that Damon intended to kiss her. That could change things for her because then she would have confirmation that he is interested in her as more than a friend... so if Damon ever gets the courage up to kiss her again next season, I don't think she will reject him.

Edit: But to clarify, I do NOT want Elena to go to Damon as a rebound! WHATSOEVER! I don't want Stefan involved in it at all. She has to want to kiss Damon because she wants to (and because she's realized that she has feelings for him) NOT just because she broke up with Stefan or something. =/

I think she wouldve tried to pullaway at first then she wouldve gone with then shed see how she really feels.

elena probably rejected damon. the first time he tried to kiss elena she smacked him

I think she would have rejected him too, since it's obvious that she still loves Stefan and would never want to hurt him. But I think there have been hints that she has feelings for Damon too - the steamy eye contact during the 'Miss Mystic Falls' dance, the glances - their friendship is growing and she's seeing the better, more caring side of Damon.

By the way, did anyone else nearly cry when Damon was so upset at the end of 'Founder's Day'? You know, when he was talking to Jeremy and "Katherine" - he thought it was Elena. I was shocked by these very emotional moments, and it's great to see Damon trying desperately to finally do the right thing. I'm going to hate watching it when he discovers he never really did kiss Elena and that they never really did experience that sweet and passionate moment. It was touching that he was hesitant, making sure that she was willing to kiss him and that he wasn't forcing to do it. Or, he was just making sure she wasn't going to slap him (again) XD

I love Damon, now more than ever! <3

the honest truth.... lol tho i wish she wuld do the same as KATHERINE!! lmao i think she would've kissed him back and then pulled away and said, "I can't, i love Stefan, Damon."

I think that she would have kissed him,too,but then she would say that it was a mistake or sth like that...

At that moment in the season I think she would have pulled back but not suddenly she might enjoy it for a moment. She was madly in love with Stefan at that time and thought of Damon as nothing more than a close friend :) but you just have to wait to see what happens in season 2 <3