Dunno why, but on my new hardware it pauses 60+ seconds after the blinking cursor shows up and before the eCS boot blob.
I would never have thought to wait, but received a phone call during one installation attempt. When I came back the eCS 1.0 installation screen was up and ready to go. It's annoying, but livable. I've heard that eCS 1.1 might correct the pause but have been too busy to install it.