That flash 10.1 support makes it awesome but i wish you could toggle it on for wi-fi and off for mobile network. IMO that would make this rom golden.I checked that here on my phone. We do have HSPA here, and with the 2.21/2.34 ROMs, the "H" icon was coming up. Also with the "*#*#4636#*#*" sequence in the dialer it then shows you what it is connected to. With 2.21/2.34 it said HSPA for me. Now with both the original 2.1 T-Mobile US rom and this rom here it says only UTMS.
Looking back 2.21/2.34 did feel faster network wise (yes, peak tests showed almost a draw between the "3G" and the "H", around 5mbps), than 6.3.190. But now 3.4.2 really sucks. Long latencies, sometimes no connect at all, and overall just slower. However one has to admit that due to the Flash 10.1 support a lot of the websites display more junk, which might disturbe the preception.