I don't think Sony said they were having a clearance sale (we all knew it, but you're average consumer got screwed).
But Microsoft have specifically said "we are bringing a new model out, but if 20GB is all you need you can have it cheap."
- Sony didn't tell consumers a new model was coming out and they were having a clearance sale, Microsoft did.
to
Microsoft made concurrent announcements, Sony didn't
But sony's announcements were within 4 days of each other. (late night July 8th to Early morn July 13th)
And they said no more 60gigs 3 days after the price drop.
It's not like they waited a month or even a week to spring it on us like you are makinbg it seem... actually you said they didn't do it at all.