I think so yes, I've been doing some experimenting with xrumer recently. It's hard now to get the links to show up at all and it has had zero affect on the sites. Not as many linsk show up in Google as Yahoo but they know that they are there, theres not alot of difference, they work on the same principles.
My reason in asking, if I ask someone to get me links, and they show up in google, then I know they have been done, and are being counted, then all you have to do is to go through other peoples site to see where their links come from and get links from those places
Yes, Google or Yahoo would take some time to show up all the links and some links may not be shown if the links are not within their algorithm.