Just checked mine (Verve Originals, 2008, seems to be a US copy as it has all the FBI crap printed all over) - the noise instability goes on for quite a bit longer, 20 or so seconds.
No need to get a new copy, Guy!
But too bad they couldn't fix it. However, as Big Beat Steve says, it's really hard to tell if it's a reed (too much saliva) issue or an audio issue - but brownie's post and my ears suggest it's indeed the later!