I think so. DS did have some interest, but now he doesn't like to go. We're trying to train him anyhow and it's going pretty well because he knows when he needs to go and he's very motivated by potty treats.
We're in the same boat. It's very demoralizing. All of my friends with kids this age have girls who trained a few months before 2. I know you shouldn't compare, but it's hard not to sometimes.
Re: 2.5 and no interest in the potty...