Are you sure? Some DVD-ROM drives can’t actually go down to 1X, and even many consumer electronics DVD players spin faster than that, using redundancy to reduce errors and such.
The PS3 does not have a DVD drive, it has a blu-ray drive. I don’t want to put too fine a point on it - it’s just that it spins MUCH slower than the 12X DVD drive in the 360. The 2X BD drive in the PS3 spins at roughly 1700 RPM (Blu-ray is constant linear velocity, so it probably spins faster as you move to inner tracks). A 12X DVD speed is about 7,000 RPM on outer tracks.
If it slot loading, it’s still got to spin at 7,000 RPM to be a 12X drive.
I can’t find solid info on the Wii’s DVD-like proprietary drive, though I’m fairly certain it’s quite a bit slower than a 12X drive. The Wii discs are very DVD-like, with the same capacities and data density, so it’s pretty safe to assume the Wii spins the discs far slower than 7,000 RPM, too.
What I’m saying is: for the 360 to be quieter, they would have had to use a slower-spec drive, or a more expensive drive than can spin at 7,000 RPM more quietly. The slower drive spec would have meant longer load times and poorer streaming of data during gameplay, though.
The 360 drive, at 12X DVD speed, can transfer about 16 MB per second. The 2X BD-ROM in the PS3 gives them about 9 MB/sec, which is why so many games require a several-minute hard drive install before the first time you play them.
My comments about them only really potentially fixing it if they do the equivalent of a “PS2 slim” in a few years wasn’t in reference to slot-loading. Just that I wouldn’t count on them dealing with the DVD drive noise until there’s a major design overhaul that involves changing the physical size and shape of the case and stuff.