Only thing I can think that would support Tini's assertion is that at a larger size, Gillam will be the one dishing the punishment not taking it. That should help reduce concussions I would think.
That being said, that argument is a huge stretch. A predisposition to concussions backed by a history of concussions means gillam is at a higher risk for concussions.
You can just as easily get a concussion by dishing it out as you can by receiving it.
I have no science to back this up, but I'm actually going to side with Tini on this one. Being bigger and stronger will give AG the ability to bring down a runner a lot easier with proper technique and he won't be lowering his head or propelling himself quite as much to ensure the tackle. That's my logic anyway.
Taking the head out of the game is a huge emphasis at the high school level right now and many teams, including the one I coach for, are using the Seahawks' instructional video to "re teach" tackling with as a rugby-style. This is a good article if anyone is interested, and it has some links to watch the video.
http://www.fieldgulls.com/football-...keyes-pete-carroll-seahawks-tackle-techniques