This is normal. The fast idle circuit is designed to idle the car high until your choke is completely open. This is to keep a cold engine from stalling.
This is a "typo" on my behalf. The car does not idle high on start-up. It's as if the choke waits till it's already warmed up before it engages.
I have not spoken to Bill.
"He that hath a beard is more than a youth, and he that hath no beard is less than a man"
- William Shakespeare