And of course, 20nm got them about 0% in terms of performance. They did get a 16-23% power reduction, however (depending on the frequency, but let's call it ~20%).
I expect the power curve might mean that they can get to 2.3GHz for the same 7.4W of power for the quad A57 cores, or run them at 1.9GHz, and dissipate only 4.8W. I'll also note that they dissipate 4.4W at 1.6GHz on the 5433, so you're still seeing about a 20% performance increase at similar power (1.6 to 1.9GHz).
All and all, about what we expected ("meh"). 14nm is not +2 process nodes better than 28nm. At best, it's +1 node, but even then it falls a bit short than what we saw going from 40nm to 28nm.
Despite being a good Intel partner, it is Qualcomm (and low end 200's at that) and MediaTek who land the phone sockets. The windozs phones are pretty low end...