Well, at least on the pubs I play at heavies are usually very eager to eat a headshot. Some can even be taken from 450 to 0 by the oldest trick in the world: Approach from behind, two scattergun shots in the back, retreat, wait 3 seconds, repeat.
I have no idea how the situation is in high-level play, though.
On another note, I recently found the Axtinguisher and started playing around with the Pyro a bit more. Killing soldiers with their own rockets is pretty cool. Despite that, I don't think I'm really any good with him/her/it. :V
Oh, and as for the steam profile: Iryan. Just Iryan.
I also got four group and two friend invites without any of the people inviting me exchanging a word about it. Naturally I didn't accept any of them thus far. :derp: