Whats you HL2 user name antony? I went on a couple of times during the evening and searched for peeps each time but to no avail. The only other DSC'er I found registered was [DSC] Freak.
I think the steam search facility can be a little 'funny' sometimes. It seemed to behave eratically last night!
The best times for me are later in the evening i.e. after about 10.30.