Without wanting to sound patronising, I agree with those who say that as 20/20 is played more in other parts of the world people will start to accept more as lots of generalisations and incorrect assumptions are shown to be false.
All this about 20/20 being a batsmen's game, well how so? It isn't as if they've made bats bigger or the track longer or the wickets smaller, it's still the same game. If you bowl crap you get hit, if you bowl well you don't. Batsmen who just go out and try to slog from ball one get out and look like idiots, batsmen who go deftly knock it around picking up singles and twos every ball are invaluable, genuinely talented batsmen who can play every shot in the book are still the cornerstone of any side. Bowlers who are loose and inconsistent get hit all over the park, those who are tight, accurate and threatening pick up wickets and stem the flow of runs. It is exactly the same contest as it is in ODIs, indeed in Tests, just more magnified. Small mistakes become big ones and great pieces of skill can turn an innings on its head. The intesne consistent examination of technique is unlike an other form of the game, where it is possible to, if not switch off, drift along for a few overs and get away with it.
For those who say it's a novelty, that was my thought when it was introduced in 2003. But now, the players take it just as seriously as the 4day and 1day formats, if not even more so since they get to play to crowds much larger in 20/20 than the other matches. I was concerned that poor bowlers and mediocre batsmen would be raised but that has not been the case, if you look at the top performers in the County Championship and 20/20, the same guys are at the top in both formats. One that has been pleasently suprising is that good spinners have proven themselves to be more than useful in 20/20, even at the death overs, and so consequently more sides are picking spinners in the C&G and National League competitions, which can only be good for English cricket.
edit: And yes, I think Tests are by far and away the best format and oul still like to see ODIs continue. I don't see why there can't be coexistence between all three formats.