i get the same news on cold (>30ºF) startups. it's a tv-static-like noise that lasts for about a second and goes away. however, if i drive immediately after, i hear a whining sound as my RPMs decrease during every shift.
it does go away after the car has been warmed up tho. now i'm wondering if i should let the car warm up for a little bit before driving it, even though there's been a general consensus on one of the threads here that driving gently for a few miles is more beneficial to warm up the car than to let it idle.