Yeah, no extra sleep. I dried my hair, stripped off my clothes, reset my alarm, climbed happily back under the covers, and laid there awake for 45 minutes.
It seems that the shower draws the line between sleeping in and taking a nap, and I am lousy at naps. Unless I'm pretty sick, I spend nap time panicking about the quickly-depleting nap time ("If I fall asleep right now I can still get 20 minutes of sleep. If I fall asleep right now, I can still get 19 minutes of sleep," and so on).
So, yeah, an earlier (pre-shower) call about the delayed start would have been nice.
But driving to work after sunrise? Absolutely glorious.