I downloaded the MP3 file that was posted by Brad Linder. It's very quiet, a little too quiet for me not to be suspicious. There's a lack of high frequencies in the speaker's voice, and no sounds of breathing. Perhaps the recording was done in a studio with soundproofing. Or maybe the file was edited a bit to remove the high frequencies.
I'm not accusing anyone, just saying that I'll wait to hear the H4n from more sources before I'm convinced.
Flintstone