lol, these ZTE Orange phones are officially dead to me. A year ago or more the Original San Fran was a good deal for the price.
However, this new San Fran and the Monte Carlo are just full to the brim with compile FAIL. ARMv6 at this price or the price of the Monte Carlo are both a rip if you ask me. How long have ARMv7 chips been out now? Given ZTE's astronomical quantities of scale they still can't manage to get one in either this or the Monte Carlo?
Average Joe looking for his first smartphone for a bit of fun probably doesn't know or care about the difference between the types of architecture, and funnily enough it is pretty much aimed at him, not your Android-power user, who will buy the latest and greatest every few months.
Personally, I don't care much about Arm7 either. Flash just about works with ports to Arm6, and the original Blade with 600mhz Cpu and Adreno 200 wasn't exactly going to be playing Arm7-level games anyway.
As long as the price is low and it has generally good specs, newbies and others inexperienced in the Android world will buy it.