Yes, as indicated in my post in the NY forum, there are several fire departments actively using the system on a daily basis. Fire Response 1 (TG 4001) is the most active, with some activity also occurring on the Division talkgroups (4007 and 4011 in particular).
If he is hearing police and EMS traffic, but not Fire, then something is wonky with his setup. Perhaps he inadvertently locked some talkgroups out. While the system does have two simulcast cells, all traffic on Fire Response 1 is being carried on both cells. Some of the Division 1 traffic might only be carried on the South cell, so he may not hear that activity depending on which cell he is monitoring with DSD+. And no, none of the Fire talkgroups are using encryption of any kind, in case that question comes up next. 100% clear.