Well, Mngwa (how the Hell do you pronounce this name??) pointed out that they're (now) considered as "Fast Attack". But agree, one shouldn't give people hope for harlequins being added to the game (they are just too awesome to be playable ).
Harlequins aren't Fast Attack, at least not in the Table Top game o.o Though their Anti-Grav belts would be so awesome in this game @_@... Somersaulting over a building to liquefy your insides!
Just ignore the pain in your tongue and go "Mnnnngwa". Takes some time to say it without putting an e or u in there.
Typically dark eldar... even when it comes to diplomacy your kin must find a way to inflict great uneasiness
Sadly so, but in the era of 40k, weapons are deadly and anyone can die in a second at the right moment (right moment for the opponent). What matters is good strategies and competent leaders. Cunning helps too. This is what harlequins (and eldar too ofc) have.