We've actually gone back to allowing all our AMR submissions to index naturally. It takes 2-3 months to get a good percentage, but it looks so much more natural, and we found that the effort required to get articles indexed was huge since Panda.
I also have to say that we've experienced better indexing rates overall by NOT forcing indexing.
If you do daily article building as a matter of course it makes little difference really, as over time, you get the same daily build rate, just delayed.
As far as 2.0s are concerned, this has yielded different results, with much faster indexing. Although any back links at all seem to help 2.0s along. Even spammy SB comment blasts etc.
I think the only indexing tools worth the effort now are networks that build permanent links. I.e. an extra tier in effect. RSS/ping seems to have massively lost it's effects in our most recent tests.
2.0s are getting indexed quickly due to their own 'weight', and the speed has nothing/little to do with the technique used to force spiders to them.
