The Ichigo / Grimmjow fight lasts much, much longer. And it also has a powerjump that makes absolutely no sense at all.
Ichigo was supposed to lose that fight. Somehow, Orihime saying "I don't want you to get hit anymore" translates into a full regen and +10,000 power boost in the final round. Everything about Ulq in this particular spot is him just trying to play off shit like it isn't personal and him trying to crush souls instead of just beating the guys in front of him. Let it play out. Once things center on this fight instead of everyoneisfightingatonce, then it picks up. Fast.