what i'm still wondering about the thundurus-t thing is that if scarf is used less than 18% of the time, with agility being by far the most common set, why is it going to be able to switch into torn-t (taking hurricane for ~50% when it does so) and then "scare it out"? i mean if the most common set by far is NOT the scarf set why is the torn-t user going to care if thun-t just switched in and lost half its health to hurricane? if i were the torn-t user i'd just stay in and finish the job unless it's brutally obvious that the thun-t is scarf (for example, no other viable scarf users on the opponent's team probably means this). you're trying to employ deterrence to get the job done except the opponent isn't being deterred.
vemane, with all due respect, i think you're exaggerating a little about how many thun-ts you see and how many of them are actually scarfed. of all the thundurus-ts i saw when i was laddering for reqs, only one was scarfed out of 20 or more (i forget the exact number but i saw a lot). most of them were agility or expert belt, the latter because of some rmt that some guy posted that's seeing a lot of usage. agility, to me, is the best set by far, and that's why it sees the most usage (in competitive battles at least), so claiming it's a check to torn-t isn't a great argument.
also, shurtugal's post is highly informative and she makes good sense from both sides of the aisle on this issue so i recommend giving it a read.