if it is a good pick at the time then yes it does. the GM does not coach the team, it isnt his fault if the player has the tools to play, seems like he has a good head on his shoulders, but fails, i could see you making an argument it was greggs fault, but not TD's. There are picks that are bad at the time, such as taking an injured player, or someone that clearly has mental and off-field issues. Mike had nothing of the sort, thus it was a good pick.
you cant say that a players performance decides whether or not it was a good pick, BECAUSE YOU DONT KNOW HOW HE IS GOING TO PERFORM, all you know is whats infront of you and you evaluate it, his size was good, feet were good (i remember him dancing on tv), his college career let us believe he was good, and attitude at the time looked good. Thus, it was a good pick. All you know are the facts, and nothing more. Like i said, its different if one or more of those scouting aspects dont line up, but they did. You dont know how he will perform thats why you project how you think he will perform, which is what everybody did, and why everybody thought he would be good.