, the "standards" he's talking about is HTML, Microsoft is famous for manipulating "standards", and how their programs handle said manipulations.
WAY before HTML5.
As for Microsoft being most compliant, I couldn't confirm or deny, what I can say, Microsoft's browser has a well earned reputation for being crap.
I don't know if its any better today because you need MS windows to use it.
Can't speak for safari, cause you need (I believe) an apple OS.
My personal preference, Firefox on Linux :)
Tried chrome, found it so-so. The flow/config / extensions weren't to my liking (been awhile since I've tried it).