Update:

> APQ8064 got degraded to 1.7 GHz, which means 2.5 GHz Krait will have to wait until
> APQ8094 in second half of 2013.
> https://developer.qualcomm.com/discover/chipsets-and-modems/snapdragon
> http://vr-zone.com/articles/qualcomm-reveals-future-plans-we-give-you-the-details/13581.html

Still no 2.5 GHz, but Krait 400 core got announced running up to 2.3 GHz in the MSM8974 SoC (and Krait 300 core up to 1.9 GHz in the APQ8064T SoC):

http://www.qualcomm.com/media/releases/2013/01/07/qualcomm-announces-next-generation-snapdragon-premium-mobile-processors
http://www.qualcomm.com/media/blog/2013/01/07/snapdragon-800-series-and-600-processors-unveiled
http://www.anandtech.com/show/6568/qualcomm-krait-400-krait-300-snapdragon-800

In the process, the original Krait core got renamed to Krait 200.