Hi,
a topic that has probably been beaten to death here too, but I wanted to share my own view on it.
I've owned my newest electric guitar (an Amfisound superstrat, bolt-on neck) for close to 2 years now, and this was actually the first time I made the Hipshop tremolo non-floating. With a temporary blocking piece, I tilted the bridge against the body.
The difference was audible. The pick attack had more impact on the lows, and tone altogether had more..body. The acoustic volume increased as the body rang more, but I realise this doesn't translate to amplified tone. What does translate, is the effect that the body has on the vibrating strings.
I have read many differing views on this, some saying it has no effect on tone and some saying it does. I thought about it a little and one conclusion is that the playing style matters. Let's say you have floating bridge, a soft attack and hence like to up the gain on the amp. Then the bridge gives away very little on the pick attack and the difference is much more subtle. The high gain setting compresses the tone and the differences are hidden more that way too.
I on the other hand, do attack the strings harder, typically when playing something rocking or a harder blues moment. It's just natural for me, and I have my action probably set a bit higher than most would set, just to allow the strings to ring more. And I like it when the guitar fights back a little. I use as little distortion as possible to give me the crunch I need, while still retaining dynamics. This is when the floating bridge makes an audible difference.
The attack thing is not necessarily good vs. bad. They're different, and when playing clean, the different attack and the ever-so-slight springiness of the tone is often very appealing. But I've got to admit, for hard rocking rhythm, I like the firmness of a bridge that doesn't give in :) I'll probably set the bridge agains the body when I change the strings next time, but first I'm gonna try what a couple of additional springs do to the tone. Right now it's got 3 springs, let's see what 5 do.
My 0.02 euros and a couple of dives.
-Zaned