I don't give a flying fuck what players besides me use. I focus on my own characters not worrying if everyone around me uses the same mount.
As in response directly to op, I like my coalfist, it was given to me from a friend when it was around 10k value, personally I love it, gives that feeling of power and dominance from a rip sense
I don't see a big deal, poundfist isn't particularly hard just rare. IF anything the Glory of the Draenor raider achieve should be something different than a gronnling.