User blog comment:Xilinoc/Ch. 665 - The Princess Dissection/@comment-5303512-20160310225005/@comment-11293956-20160311201634

I guess you can say that the Elites are stronger than the Royal Guard. The only reason they were able to fight back the way that they did was becaus of the Aushwhalen (probably didn't spell that right but whatever). Nimiaya was more than enough for them until they got that power boost.

As for Grimmjow, he couldve been training since we last saw him. He's had more than enough time to do so. Plus, considering he's not chained up next to Harribel, he's at least strong enough to hold his own aginst them and not get captured.