Transcribing native speakers using dictation tools - any suggestions to improve accuracy? I tried playing this to iOS 7's dictation feature:

https://www.youtube.com/watch?v=N6jhgUWBlxQ

The accuracy was pretty poor at regular speed, I'd say 20%, at best. I tried slowing down the playback speed and it didn't help.

Has anyone used dictation apps/software to transcribe something like the above with better accuracy?
科大讯飞 makes the best Chinese dictation engine so far. The accuracy is far better than Siri according to reports. I've tried with their IME. If you speak clearly with a normal speed, the accuracy could reach 90% in many cases, but using it against fast conversations would surely be a frustration.