No I didn't specifically say login script. The timeout value in group policy pertains to all scripts. Computer scripts and login scripts. So from the time the first computer script starts running to the time the login script is done processing. That is the max value I'm setting in group policy.

And the script I'm refering to in this post is a computer startup script designed to deploy Office 2003. So to answer your question, no the login script only takes a few seconds, but the computer startup script takes a good 15min to complete even on a fast computer.