From my experience, rushing the front of a plane during deplaning is common in Asia. I noticed it the most in Thailand, China, and India, but I've admittedly only had a few travels there. I've asked a few Asian natives about this trend, and the general consensus so far seems to be that, especially for China and India, there is a sense of "everyone for themselves" due to the sheer population density in many areas. If you don't push forward, you won't make it onto a crowded train.

I have seen much less of this in Europe and North America, except for the occasional eager individuals or small group. In those cases, I haven't noticed any perceivable pattern in ethnicity. If I had to pick out a trait that comes to mind, I most often notice it in younger men. It could be confirmation bias, though.