Of course they visit...they for sure are very connected with the community as a member here stated.... I have a positive opinion about the Adsense Team. They have answered all of my questions and have also I see that they make efforts to make their product better and better.
Surely any business keeps an eye on its channel, which is basically what we are for Google. If they post helpful replies which help us stick to TOS etc it can only be a good thing!
It's nice to know that some google employees are here. Why they will not? I wish they are just like us i mean webmasters. So they should be visiting digital point that's quite clear. But may be Google has policies for his employees also. LOL. That's why they don't like to publish their identity as a Google Worker.May be because Google has rules about it. Previously i have seen a Google Employee in Webmaster World Forum . He is called Google Guy. And he was very helpful. They don't need to publish their identity. They should share experience and support the community about Google related services. That's much more we expect from them.