Apple's Keynote described it as HSDPA, not HSPA+ i think HSPA+ is backwards compatible and so ATT is probably thinking they can get away with calling it that, after all, look at what they've gotten away with as far as 4g branding, but i think you may be getting caught up in a pissing contest that doesn't matter. If ATT has HSPA+ in your area, than it inherently will work with HSDPA as well. Bottom line being, if anyone gets faster speeds from the new phone, its you and people in area's like yours and mine, assuming network conditions are ideal. So yes, you have reason to be happy.I'm not doubting what you guys are saying...it is very helpful. But as I read the AT&T site in a couple places, it just seems to contradict that and indicate that it is in fact HSPA+.
AT&T Coverage Map:
http://www.wireless.att.com/coverageviewer/?wtSlotClick=1-0061J2-0-6#?type=data
Then when I click on the 4G link below the map it states:
4G: The areas shown in darkest blue represent AT&T owned HSPA+ network with enhanced backhaul. AT&T's HSPA+ network is capable of delivering 4G speeds when combined with enhanced backhaul. 4G device required. Learn more about 4G.
Then when I go here and then click on the Details link below the image of the iPhone, then the Specifications tab, it does say HSPA+.
http://www.wireless.att.com/cell-phone-service/packages/packages-details.jsp?q_package=sku5370394#
Based on the network description of HSPA+ and the iPhone 4S spec stating HSPA+, isn't it HSPA+?