What percent of surfers type in url?

[SirMoby]

I think the number is pretty high. If you go to Overture's inventory page, which gives some number based on the amount a key phrase is typed into certain search engines you'll see that some pay sites rate very highly.

If an exact pay site names shows up in search results I'm sure a lot of surfers type them in by name. I can't guess the percentage but I bet it's plenty.