I think so?
At any rate, literally nothing suggests that any switch was pulled or anything of the sort, and Frisk is fairly blatantly superhuman even without determination regardless: what with the being able to survive Hotland, balance 29 hot dogs on their head, get up from falling at terminal velocity without really being hurt at all (not a single point of damage at Lv 1, with no items equipped), et cetera. Sans would know that, and again he's almost assuredly the one who dropped the hint since we know for a fact he A: more or less follows you your entire journey, B: can see into other timelines and thus already knows the answer, C: is the only monster heavily associated with the telescopes, et cetera. Besides, even were it a basic hint left for other monsters, they are superhuman and thus able to bust down walls, as well, so not really seeing that argument.
Graphical limitations don't really restrict feats from being feats when logic contradicts said graphical limitations, Snake's P-Bomb calculation is a prime example of this. Not really seeing that as an argument in and of itself.