Even if it is to confirm your understanding of what Beethoven put in there and nothing else, by all means take the 15 minutes it takes and listen to the variations rather than skimming through them.
I appreciate you taking the time to write a few comments and would love to hear more. Your point about the time is of course well-taken. I do not think this music lends itself well to a performance well-clad on a regular and forward-moving tempo - on the contrary, I think one of the beauties of this and the Op. 111 variations is precisely the loss of a sense of time-progress, as if the passing of time became illusory in a reality that is timeless and simultaneously constant.