That's bunk, you're just making things up. With 90 perception, those with 100 hiding are still quite difficult to see. When have you even seen some one with 100 hiding? You don't even leave your one man homestead.
Not at all the case, when your hiding gets high enough the colors you wear are irrelevant since you basically become a shadow that refracts light. In fact, the giant green baskets would make you easier to see since your profile and refraction silhouette are bigger.
Most of us (aside from myself) have macroed it pretty much exclusively. Well, that and jump. Two of them in particularly didn't really have time to play the game (or didn't want to deal with its bullshit) so all they did was macro hide, in propriety, for the entirety of the last 10 days. Hiding skill gain, we think, was nerfed even further about 4-5 days ago so that you get maybe 1 point per night of macroing... but those who were doing it all the time had it in the 90s by then anyway.
I suppose I could ask them to give me screenshots, but given that the only two people I know who claim to have 100 hide certainly LOOK like they have significantly more hide than those with 80, and that they may as well have been macro bots for the first week, I believe it.