PR with the lemmings, or go against the grain

With the US long weekend over, I am working on getting some PR to further the growth of HearWhere.

Lots of blogs advise to submitting Press Releases on Tuesdays through Thursdays.
The theory being that if you release on Friday, it sits around over the weekend and doesn't get enough attention when nobody is looking, and Monday people are catching up on the press releases that you shouldn't have sent in on Friday(?).

However, does this also mean that most Press Releases get submitted mid-week and therefore there is more competition on those days? Since everybody is taking the advice of the PR blogs, should I zig while everybody else zags? or follow the advice of the experts?