Aw Aleks is a great teacher. i think Alec's probably learned some respect for the dude. You don't see many teachers going, I know you failed, but let's talk about it.
Alec is the kind of kid that antagonizes the seven foot weight lifter into a sparring match and goes into it with no plan at all. He wings basically his whole life, because 'fuck it' is like his motto. So when he fails, he kinda laughs about it and goes 'well that's a lesson learned' more so than dwelling on it. But i do thingk he also kind of envies other people who have concrete powers that are specifically theirs, that they can develop and rely on, instead of having to take from other people. so even though Cliff isn't great at super speed, it's better than nothing. So if Alec can make him feel better by totally failing, he's here for that lol And if he does mimic his speed, Alec would prolly actually respect the poor kid more, because damn.