Yeah, I don't care if Rinette only had 44 seconds left on the clock. You should make an effort to move at least a little faster. Gareth wasn't too bad though. He just lacked the ability to maneuver through tight spaces because he was rather chubby. 
Yeah, 44 seconds should be enough time to make it to the top floor at least. But instead she doesn't even make it past the Holes of Python.

I don't understand how anyone could defend her when she had enough time to at least do something. But I agree, I never really thought of Garrett's performance being bad or weak. Other than the Holes of Python, he kept a steady pace and knew what to do in each of his rooms. The one room away guard was very cheap and unfortunate. Plus, he moved just as fast as Mitchell who gets nothing but praise.