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.
3570K @ 4.8GHz - Z77X-UD4H - 16GB Samsung 1866MHz - GTX 780 Lightning - Crucial MX100 256GB - QX2710 1440p @ 96Hz