Interesting insight by Matt over at 37Signals:

Want something to blow up? Tell the world about it on a Tuesday morning. Avoids the Monday avalanche people face and gives you the rest of the week to get play …Want something to fade away? Tell the world about it on a Friday afternoon. It’ll fade into the weekend.

This backs up what appears to be the case on Daily Exhaust:

UPDATE: My brother brought to my attention the unfortunate choice of words Matt at 37Signals decided to use in his post in light of next week’s upcoming anniversary. It should have been more obvious to me, considering I was there.