Well crap, after doing this gig for over 30 years I just found out you can't mow at full speed.
Huh, wish someone would have told me that a long time ago.
No, you can't go full speed all the time. But you don't have to go slow all the time either. It depends on the lawn, the height of the grass, whether it's dry or wet, etc.
I have no idea what a Cub Cadet will or won't do, but some of these guys advice is ridiculous, some of it is OK and some of it is right on. Most of it is getting a feel for the mower and what it can and can't do.
As for mowing in circles, those ballparks with circles look pretty awesome. Besides, it beats the crap out of raking the whole lawn.
And orangemower, you haven't made a single mistake? Whether business related or the actual work? A manager of a lumber yard knows everything about the lawn business and prevented any and all mistakes. Wow, better watch out Donald Trump. That is truly amazing, that you have never made a mistake.