Yes indeed, in its AT configuration an 88 is treated completely by the game as an Anti-Tank unit, with all that implies for bonuses against Recon/Tank, it becomes a city capture unit and not support, etc. The only thing that kills me a little bit is that StuG units are always treated as Artillery.

As a grunt I always appreciated the historical legacy of the StuGs, as anybody brave enough to bring an armored vehicle in knife-fighting range is always popular with leg infantry.