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I've just read your post and my first reaction was "Oops, he submitted the reconsideration request already!" Seriously, you might not have been penalized just by building a few links with Rank Jumpers. I did receive that "death note" on April 4th with one of my Amazon niche site which was heavily pumped with links from ALN. And guess what, that site continued to perform even better until last day when Google launched its new "crazy update"
What I want to point out is, yes, google might notice about the unnatural links coming to your site, but to base the conclusion that your site got penalized just because you received that automated message is not solid. I myself and many other webmasters realized that it's more of a scare tactic from Google to force webmasters report their link building pattern to them so they can go and nuke down the sources.
But that's just my own observation with my sites as well as from many other webmasters. I can't tell you with 100% confidence but I think your loss of traffic has more to do with the recent Google update than with that automated message.
Anyway, I wish LWB will come back even stronger :)
1 year ago on Leaving Work Behind Has Been Google Slapped!