Yes they do, i seen testes where they were used to test if link text was passed though a 301, so yes, they must be at least the ones he used, and they did pass link text also.
best test it yourself
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Posts made by AlanMosley
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RE: URL Shorteners. Are they SEO Friendly?
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RE: Recovering From Black Hat SEO Tactics
Isthere any sign of penalty, a huge drop in rankings? if not then I would not worry too much about the links, they may be worthless but it si doubtfull they are doing harm,
You can ask gogole for reconsideration from GWMT, but i doubt that is the case unless your ranking has shown a huge drop. but it does not hurt to ask. i would be more worried about on page stuff. make sure your site is not hiiding keywors and the like.