Since when has bandAmp had the possibility to display songs according to Genre? Main page, left hand menu, above House Mix.
Or have I just never noticed it before?  

Really Cool! But could someone explain how a song is given a Genre tag ?

It's been there.

But look at how old the songs are. :/

Yes good point, it must have been set up manually , in a time when mud was around, or slasherX with the big boobies !!??