Definitely not, +/- 0.00000001% since I don't actually have the entire soundtrack of SMB on my hard drive, and can't do a direct comparison. But it doesn't sound like anything I remember from Nintendo.
I know it's not the main theme, which is permanently embedded in my synapses. Frightening thought, that.
edit: Yes. It is. It's a wiki for Bob's sake. Any moron could've written that.
http://www.geocities.com/chp295/coolwavs.html <- MIDI, because I'm not going to waste my bandwidth on such a silly thing.