Depends what you classify as a wave. In CT and the most of the northeast, H2s are not a common truck -- not as much as Suburbans and Escalades. However, most H2 owners will wave to each other if their men. This wave possessing all five digits, moving from left to right. I've waved to women driving H2s only to receive a do-I-know-you look or no look because she's got a cell phone attached to the ear -- a very dangerous situation in the making.
However, the other type of wave that is very common at least in CT is one that contains the one digit, usually the thumb, in a pointed down motion.
A women, less restrained, gave my wife the other one-fingured wave when my wife was dropping off our kids to school. Upon my wife's way back from the school she encountered the same woman who had smashed the front of her car into the side of someonelse's vehicle. My wife naturally and kindly gave the woman a five-fingered wave as she passed the acccident, which the woman had clearly caused.