Nope - not correct.
Really? I'm not saying you're wrong. Hell, I don't even have one of these yet... but it doesn't make a whole lotta sense to me for 2 reasons:
1) Why would you need to detect that there's a driver?
2) I thought that's why people were complaining about the driver seat getting saggy... Norm's fix was to add padding, I thought because the passenger seat had the added sensor hardware, but they used the same frame/padding on both seats...
Again, I could be wrong. If you've either seen it, or seen the wiring or whatever, I believe you. I was just under the impression it was passenger only.
Matt