I love it! I was playing Killzone 2 and while in a high profile enemy building one of comrades says to me "Stay frosty"
Also there is a soldier with a name that's very close to Vasquez, can't remember what exactly though.
Call of Duty 4 was the best for little homages though, they had Vasquez and the stay frosty line aswell as the "I like to keep this handy for close encounters" line.
