I can confirm this. Matt Trainer used to be an official presence on forums (developer liaison) but moved to a different part of the company. Since then no one has really stepped up to fill in his shoes.
To be honest though, the forums have never been a way to get in contact with Facebook Staff. The best recourse (which is actually pretty quick these days) is to file a bug report and have developers pile on support and votes. For example, I filed a single bug report last night and had it looked at by a Staff member and priority assigned in less than 12 hours.