I have never seen him look this bad. Jags have a good D, but this is mostly on him. Leftwich is a good QB, but I do not know if he will ever make it to the elite side of things. But compared to Peyton TODAY he does.
On one of the morning game preview shows they did a nice analysis on how Jacksonville consistently slows down the Colt's air attack. Essentially they mix up a bunch of coverages with many focused on bumping the wide receivers at the line of scrimmage and having someone back providing deep help.