Well, since Burress signed his deal the day of the first game, it is not as if the Bills are so far behind, yet, when it comes to Evans.
I asked the question honestly, in case this was some reference to Peters, who, you may have heard, has held out.
There are many reasons for Evans not having his extension yet. You may choose to blame it on the front office, it may be, as others have said, that Evans may want to wait and see. No matter how good the Bills' offer might be, they cannot force him to sign. A lot depends on his own sense of his potential value. If he signs an extension anytime between right now and next March, all is well. Way too early to panic otherwise.