I noticed this change right away. ranked top 10 for the term hiv on yahoo for a little while now roughly #7 and bam dropped to #26. My taco bell site went from #8 to #4. My hiv sight more heavily seod than the taco bell one but also had more of the same anchor text on inbound links, as my taco bell one had more of a mix to them. but my pr on the hiv site jumped this week from 0 to 5.