It does, and that's why the Eagles were a legitimately good team and not total frauds like the Minnesota Vikings.
Gannon helped bring that team from 25th in defensive DVOA the year before to 6th this year. They held four teams to single-digit scoring, including two teams in the playoffs.
This was also a year when the top teams weren't as good as the teams in the past, so you're probably buying very high on the guy.
I'm not really fussed about any of that to be honest. Seems to me he's being hired for a skill set rather than a record.