Ah, the good ol' days. I remember having a 10 minute discussion with a user, trying to explain to them why a 3.5" was indeed still a floppy.

Finally gave up with the explanation, and ripped one open to show them that indeed, it was floppy, inside.

I don't know if it's standard, but it's pretty common. I don't know about marketing trick. Usually context is enough to figure it out.

I mean, the difference between 0.283 and 283 is significant to make someone double take, and find that leading decimal point, I'd think.

Wouldn't being able to revoke reviews entirely defeat the whole purpose of user submitted review?

Metallica was approached, but Lars nixxed it citing losing control of the IP.

I imagine a lot of the reason is turbo cars tend to be performance/sporty cars. Since the goal tends to be performance over comfort, they usually strip off the convenient features that add no performance but increase the weight.