BG beat Maryland. Maryland and Purdue might be the worst teams in the Big Ten. The MAC and smaller conferences have been sending players to the NFL for decades, that's nothing new.
It's still showing how bad a team like Purdue is though. Purdue's lost to 5 MAC teams in the last 10 years. From 1985-2005, Purdue lost to 3 MAC teams (out of 19 games).
Some MAC teams are ok teams, there's no doubt about it. But it's no different than smaller schools in basketball - they have limited talent and little depth. Western Michigan's recent recruiting class was considered the MACs "best recruiting class" since 2000. It was ranked 59th in the country.
So no, that's not a level that should be eclipsing Big Ten schools (and yes, that recruiting class was better than Purdue's!). Pointing out the MAC has some good players and good coaches is wonderful. But the problem is not that - it's that Purdue's gotten so bad that our recruiting classes have been ranked as low as 72nd!