I'd say it depends on the sites in your sig... but it can be pretty nice. I think the most I've gotten from my DP sig is about 70/day and that's only because I was offering free webmaster stuff. I think that if you have an interesting offer, DP members are quick to support you with it, and that's nice. Thanks to everyone who clicks on sigs!
I have had 64 so far this month. I guess the amount of traffic that you would get totally depends on the amount of posts that you do, how popular you are in the forums, how much your signature stands out and what topic it is on. DP is definately not my main source of traffic for my affiliate programs site, but it is more targeted than some of my other traffic sources. I didn't look at the stats for the rest of my sites.
I used to get around 50 uniques per day when I had links in signature. However, most of this traffic is out of curiosity and not much that targeted
I am just wondering why if you get a little traffic you have removed your links? Were you asked to do it or did you just do it because you wanted to remove them.
As I said traffic was un-targeted and I don't want to have anyone look at my websites (perticularly other webmasters)