The Collaborative International Dictionary of English v.0.48:

Brusqueness \Brusque"ness\, n.
   Quality of being brusque; roughness joined with promptness;
   bluntness. --Brit. Quar.
   [1913 Webster]

WordNet (r) 3.0 (2006):

brusqueness
    n 1: an abrupt discourteous manner [syn: abruptness,
         brusqueness, curtness, gruffness, shortness]