i think a lot of this comes down to personal definitions of the term bottleneck.
a bottleneck means a limit, something you cant just ram more performance past - a faster GPU and faster RAM wont speed up a games performance, because the CPU is the limiting factor.
Thats what we're all talking about, and its true - compared to the intel CPU's, the AMD is the bottleneck. Acceptable performance is an entirely different thing.
OP's question based on thread title: will A10 or comparable CPU's be a limit to min or max FPS on a high end GPU like the 290x, compared to other CPU's: yes.
does it make it unusable, or provide unacceptable performance: no, depending on the user, and what games and settings they use.