I have a HTC Droid DNA and I am very impressed with the performance. It's not a fast as the iPhone 5 when it comes to opening apps and such. Games and web performance are very good, no slowdowns that I have seen. Ohh yeah and Youtube @ 1080P is amazing.. the screen is amazing.
5820K @ 4.4GHz - ASUS X99-A - 16GB Corsair LPX @ 2666MHz - GTX 780 Lightning - Crucial MX100 256GB + 1TB HDD - SB Recon3D - Corsair 500R - EVGA 750 G2 - QX2710 1440p @ 96Hz