Dvorak is certainly better than QWERTY. Were it not for the L/S, I think it would have reaped the benefit of its long pre-computer history and popularization efforts and spread like wildfire in our computer era (where it's only one click away). It wouldn't have to contend with new and more pinky-friendly rivals like Colemak (my preference, but not as easy to install for the technically indifferent as Dvorak).
I really can't fathom what Dr August was thinking when he placed L and S under the right pinky.
Do you really think that something as trivial as the L and S placement is what held back Dvorak adoption by the masses? When compared to the hell that is QWERTY, something like that is insignificant. The simple fact of the matter is that people don't want to leave their comfort zone and have to spend time learning something new when the old way is still functional and universal.
That and the whole pinky thing is really quite overblown. With light switches like the Cherry browns, I can't remember the last time I thought "Damn, if only I didn't have to use my pinky as much." If anything, I find the consonant/vowel hand alternation that Dvorak has to be more of a problematic thing than the whole pinky non-issue.
On a somewhat related note, the zeal some people have for Colemak reminds me of Linux in a way. Both have vocal proponents thinking that it's the next big thing and that it'll soon become mainstream. Except it doesn't. In reality, it'll forever be an obscure layout for keyboard geeks, right along with Dvorak. The best anyone can hope for is that some day Microsoft will think it's popular enough to implement as an official input option. Then it'll at least be on par with Dvorak for out of the box support.