The Store actually "began" to update around 8.45pm EST yesterday, I say this because being aware of what was being released I was able to use the search function within the PS Store to search for Journey & a Demo or two & downloaded them last night, but yes. the store update was again late yesterday, which for those of us on the East Coast, & that includes me is very frustrating, especially if like me we're up early for work the next day, but so be it.
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Yeah it was late, but it has happened before. Back when it updated on Thursdays, I remember once it wasn't up at all on that day. Also you can watch the tester on the PS blog; maybe it's just an embedded youtube version, I didn't watch it so I don't know.
Edit: It was August 28, 2009 I was thinking of . Friday update.