How does Gary Anderson make his bbc f1 predictions?

On the BBC 2012 Australian qualifying highlights show Gary's pit stop strategy said that 3 stops gave the best time and could judge how far behind the other pitstop strategys would be to 1/1000 of a second. How?

What is a VPN?

VPN is (Virtual Private Network) were first used by companies to enable their employees to securely access internal systems such as email remotely (e.g. from home or while on business trips). Today they are increasingly being used for personal use by individuals to protect their privacy while online in public places (e.g. when using the wi-fi connection in a cafe) or in a country where the internet is censored / blocked (e.g. China, Saudi Arabia…).