On several points I agree, but Behance (I'm not talking about the technical difference of width, messaging system etc, but about the users of the first compared to the second) is not different from DA.
It's a matter of percentuals.
On Behance the percentual of professionals and people that do good stuff is bigger than DA, but there are however a part of users that post their random "not-so-well-done" stuff exactly like on DA.
On Da this is the average part, but there are "hidden" gems and you have to browse through a huge ocean of shit, but you can find a lot of interesting people, like on Behance.
On Behance it seems that there are only good stuff but in that case the hidden gems are the "not-so-good" users.
And often, if you find a good artist/designer on DA, he, she has a Behance account.
And, yes, I think that who gives daily deviations should make up his/her mind a bit, because sometimes you realize that a DD is not about quality but about popularity.
See ya on Behance mate, cheers