Pollock's figures between 2001\02 and 2006 are in fact 150 wickets at over 28, which is nothing more than a middling record. It's not poor, of course not, but it's certainly not remotely close to being outstanding, and hence he cannot be said to have conquered flat pitches the way Murali et al have.
There've been very few great spin-bowlers since uncovered wickets ended, for this precise reason. Hardly anyone spins it enough to be effective outside the subcontinent, and almost all those that try to can't do it with enough accuracy (broadly these can be classified as fingerspinners and wristspinners, but as Kumble shows not all wristspinners are the big-spinning-wayward variety).
Ergo, Kumble, like most spin-bowlers, isn't a great, he's merely a great at home and mostly anodyne away (or roughly that anyway, there have been some exceptions).
Err, no it's not. The bowler has the ball in his hand, how nonsensical to suggest the batsman controls the game.
There have been countless hundreds of better bowlers than Pollock in history, and countless hundreds of better seamers than a mere spinner in Kumble.
The Gilchrist of the last 4 years would be outstripped by any number of wicketkeeper-batsmen in history.
That Ponting can be considered such - so unequivocally - is indicative of the low quality of the period.
Vaas' presence is no gurantee of anything and never has been.
Pollock hasn't been one of SA's best ever for a long while though.
In any case, there will be fine players at any time; there were far more in the 1990s, 1980s, 1970s, etc. than there are now. There are nowhere near enough good bowlers, and hence we cannot know how good the batsmen really are.