Framerates using Canon 550D/600D hover bewteen 20-26fps - why?

[indianairlines]

Hello.

I am using a 2020 Macbook Pro M1 laptop with 16GB of RAM. I have two instances of Camera Live running - one each for my Canon 550D (T2i) and 600D (T3i). Both cameras have the latest firmware installed. I can only get an average of 22fps out of each camera - see attached images from Simple Client. Is this just the nature of Camera Live with these particular cameras? I've seen others here getting 60fps and above from other cameras, so I wanted to compare notes.