I have to get my hearing checked or something. It seemed to me when the men came in that they were quite a ways off pitch. I love the concept, but I didn't even listen through the whole thing because of this. But I was totally off with a tempo slur I thought I heard in a drum loop that rharv posted that on a 2nd listen on a different computer (with much better speakers and potentially a different .mp3 codec) sounded right on time.

It does remind me however of one of my favorite TV commercials of all time - even though it didn't run in the US. It's a Honda Civic commercial where a choir does a performance of the experience of driving a Civic. Google with these search terms: choir honda civic commercial

and you'll hit it.