Ummm ... it's one thing when people level legitimate complaints about DL, but I'm going to have to step in here ... where do you see that DL is the worst in ontime performance over the last year?

According to the DOT report that you linked to they have been number 2 over the twelve month period ending 6/99 behind only Southwest ... As a matter of fact as I had pointed out elsewhere, DL is consistently highly ranked in all categories tracked by the FAA this year except for the problems they've had with involuntary denied boardings.