Well here are how the leagues faired in terms of record OOC against Power Programs:

BIG 10: 9-8
SEC: 6-5
PAC 12: 5-5
BIG 12: 4-4
ACC: 7-14

Notre Dame was 7-2 against Power teams... which are included in the numbers above.

Since 6 ACC teams played Notre Dame, the ACC certainly had the toughest slate. However, if you take Notre Dame out of their record, the ACC still finished last with a record of 6-9.

Another way to look at things is to create a point system such as the one below:

+1 point for each OOC Power Program Win
-1 point for each OOC Power Program Loss
-1 point for each additional FBC Loss
-2 points for each additional FCS Loss

This system only rewards wins against OOC power teams. It does not reward any OOC wins against non-power teams, but does penalize losses. Each loss to an FCS team is penalized twice as much.

Here's how many points each league has in that system:

-3 BIG 10
-4 PAC 12
-4 BIG 12
-5 SEC
-12 ACC

The SEC had 5 losses to non-power programs, including one loss to an FCS team. That's why it faired worse.

Arkansas lost to Toledo.
Ole Miss lost to Memphis.
Vanderbilt lost to Houston.
Vanderbilt lost to W. Kentucky.
S. Carolina lost to The Citidel.

As bad as a year as this was for the SEC, it could have been far worse.

Florida won in OT vs. Florida Atlanta
Georgia won in OT vs. Georgia Southern
Auburn won in OT vs. Jacksonville State (FCS)
Florida only beat East Carolina by a Touchdown
Kentucky only beat ULL by a Touchdown
Missouri only beat Arkansas St. by a Touchdown
Missouri only beat BYU by 4 points
Missouri only beat UConn by 3 points

That's 8 wins the SEC did have against non-power programs that were by a touchdown or less. It could have been far worse.