My honest opinion is Mort might have been reaching a little, although I can't see why he would (to my knowledge he has no dolphin bias). I believe the play at our tackle positions (so important to an offense) has improved...but I have not heard tell of much improvement on the inside of the offensive line.
I said it before, and I do believe that when the season is over, we'll look back and I'll have been right...I think it was mistake to not do anything with the interior of the OL. We took last year's crap OL, added Stockar McDougle (a mid-level FA that looks like he could pan out beautifully), added Damion Cook (who may not make the team), and added Anthony Alabi. Now, I don't necessarily believe in an overhaul...we overhauled the OL last season with terrible results. But, given that, I still don't believe we did enough from a personnel standpoint.
We really will just have to see. I think we'll start getting a dramatically better idea of how we're shaping up during preseason though. I will trust my instincts from what I see on film implicitly.