Richland provides that good enough level for average steam user, a thing AMD probably targeted. With 2133Mhz memory and stock APU clocks, majority of today's games are perfectly playable at low settings and 1080p(as demonstrated by AtenRa and many reviews). The target user group is not a HC gamer profile, these are regular folks who probably have one or two kids and want to get a solid and relatively cheap PC (for entire household) that works good in most of the stuff they use their PC for (internet, office, productivity apps, light gaming, maybe some programing). Richland is a perfect fit and nicely sets the stage for Kaveri.
Except the fastest RAM you generally find in an OEM system is 1600 mhz.