Both sound the video quality seem substantially better using the Cycorder app --> Flickr than going directly from the camera -- live -- to Qik.
Qik's transcode to flash boosts the audio high end to a disruptive, sibilant end result, and the video quality is only so-so. That's the tradeoff for streaming live via 3G networks. My guess? It's a bandwidth thing. Don't take my word for it, see a Qik video here: