yea, i've noticed with a lot of them that in the meshflow, or the shape of the character/model or something (not sure really what it is) something does give it away, and everythime i see a model out of makehuman now i can tell that it's from makehuman because i use it alot to mess around trying to learn rigging...

my vote is on yes, because of that, but i'm kind of not sure about using something like this for finished models that you get credit for, even if you only use it for a small part, llike an ear for example, but as you said, "if you are looking for something unique and different, then the best way is to build your own models"