Ugh, are you seriously implying he hasn't been? Not sure if you're just so accustomed to seeing a shit show of tackles to distinguish the difference between good tackle play and mediocre to average play.
What I've seen from Long is Good to Average play. I've seen him make some young mistakes early in the season that he cleared up. I've seen him shut down some pretty good pass rushers since then. I don't think that his play at tackle is what has made our Oline have protection issues. In fact, I'd say Long moving to tackle has been a great success and gives me confidence that in time, he could play well at Left Tackle.
Also, the Bears aren't the only football I watch. So no, I have seen great play from tackles in the NFL. I find it humorous that you would suggest such. Your posts in this thread suggest you have no idea about time and possession. You seem to jump on every call or play as if it were Fox or Cutler's fault. The truth is that there are far more working parts than just "a coach" or "a QB" being at fault. But you don't seem to ever take that into consideration. ie. Jay's int or Fox not going for 2.
And before you make a statement that I'm some how a fan boy of these guys, I did see plays I thought weren't the best call and passes from Cutler that weren't that good either. But I don't knee jerk my response because I see all the other failures and success by all the other people involved in winning or losing.