Sure it is :-)
Setting it 6667 for now.

Connecting to frontend: dtc2.graymines.net:6667 ...
Connecting to bitcoin: dtc2.graymines.net:33339 ...
Connecting to signals: dtc2.graymines.net:33340 ...
Work received: height=2312445 diff=9.8583474 latency=236ms
GPU 0 found share: 7-ch type 3
Share accepted.

edit: also 1st block mined :-D

M.