I've heard that the 3-4 provides more mobility, and at least as far as college football goes that's pretty important, especially with the recent trends of the spread offense and dual-threat quarterbacks. I think as a lot of offenses start to "blend" positions (stuff like the Wildcat formation) defenses will start to adapt with that same hybrid mentality, and I think the 3-4 is better-equipped to do that.
I'm pretty excited to see what GT's defense is going to look like next season despite a second straight year of losing our best players.
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I'm never gonna dance again, Aspie feet have got no rhythm.