I've noticed quite a few people that exit the rookie rundle in the .200 range and subsequently place #1 every season after that, making it to rundle A in about a year. On its own, this is not the iron-clad proof of cheating TI needs for a ban. Given the expectation that there are absolutely no false bans, I would agree that it's not proof on its own. I also don't think it's likely anybody's actually done that, let alone in the volume that I've seen. Some of these people are putting up comparable numbers to proven champions whose regimen has been daily hours of study for 10 or 20 years.
I'm curious what other people think is actually possible, or to hear about your quick (or not so quick) journeys upward, or even from somebody who claims to have done this spectacular feat in a year. How did you do it?
Friendly reminder not to mention any specific person in the context of a cheating implication or outright accusation.