Not true about Gulbis.
And not sure if you have ever watched younger Federer, because he certainly did fist pump.
Young Federer is not peak Federer. Young Federer was very emotional, and got angry very quickly, but Roger phased that out of his game when he became more mature. He even said himself that he went too far in this, and needed to show more emotion again (was in an interview with him a while back on tv, don't know when exactly).
Are you shitting me?
what an asinine comment. He showed plenty of emotion with his "Allez" and his fisting pumping and occasional "come on" during his peak years. Just because he doesn't say "vamos" and pump/shake his fist every two points...
Good luck trying to find a player that NEVER does one of those things. Out of all the players, peak Federer definitely was one of the guys who showed the least emotion on court