[Does the reroute at the Mexico border take more or less time than the original route and approximately how much time does it add/subtract]

I am writing this on behalf of my dad & favourite Tour Divider, Greg Andre-Barrett, who called me today from Colorado:

"Does the reroute at the Mexico border take more or less time than the original route and approximately how much time does it add/subtract?"

Pls. get back to me asap - he'd love to get this info sometime tomorrow, if possible to see if he needs to change his flight info.

Thanks for your help!!!!

While i'm here, feel free to check out his adventures or follow his blog @ http://gregridesthedivide.wordpress.com/