waynne - 7:24 am on Jun 7, 2013 (gmt 0)
I've tried a lot of different paid press releases and don't find them to have any direct effect on the rankings of the sites concerned.
A few deliver a dribble of traffic over time.
You only really win with PR if they go viral and are picked up by the regular media as Tedster says.
If you are doing PR to boost your page rank then it's a waste of time.