Not really, no. The ACC had 10 teams among the top 50 or so in the country, and only one team in the top 10. That's pretty much how the league was ranked by the end of the year, and pretty close to how it was seeded. No ACC team overachieved in this year's tournament, but no team massively underachieved this year either.
Do not mistake having more strong teams at the top of a conference for having a tougher conference overall.It seems that the Pac 10, SEC and Big 12 were tougher conferences.