I'm watching the NCAA wrestling Division 1 championships that I DVR'd from this past weekend (3rd place matches right now). And among the many things going through my head presently is how great it has been that GB in general - and my academy, GB Seattle/Washington in specific - has embraced short, 90 second rounds for specific training (ex. guard/pass guard).
I think a part of me is still getting used to it. But the more I train it and the more I think about it, the more I think that it may be one of the best parts of the whole Grace Barra "Back to Basics" project.