I agree, I knew she wasn't the uber claymore, but since that girl came to her and asked clare to kill her, i thought she was at least a semi-strong, out of 50 or so i would rate her at the 20th or something..
also, the "man in black" made it seem like she was pretty strong, so either that he sees something in her (potentiel to uberness) or that he acts the same to every claymore girl.
is there only one of those guys or are they a group?
and yes, Claymore is starting to look like a realy good manga, after the first 4 volumes- which were basically a stupid hunt for monsters, it starts to develop some deepness.
edit: I've gone through volume 1 - it seems that the guy's (man in blakc that assigns her jobs) is Rubel... pretty cool person.