I also dismiss the truck load stories as surely putting several coyotes together in such close quarters would prove deadly to all creatures involved.

On the other hand my friends son in law shot an 83 pound coyote this year during deer season. He has great credibility and absolutely no reason to lie.

Even the PGC admits to large coyotes. Did the agency release them??? No, I would not put any money on that one. Could they be hybrids? Could they have wolf blood? What is the reason PA is experiencing such large preditors? Hey, Pennsylvania is shooting 700 and 800 pound bears! You can't kill a black bear in Montana that weighs that much! How many fawns does a 800 pound bear eat?
I think Slinsky's idea of including a study is relevent. If they are going to have an affect on the deer herd there just might be justification for some form of study, and the agency should be leading the charge.