If you have a straight string pull, locking tuners, and a well setup axe, you can get stellar Floyd-ish results out of many wiggle sticks.
I've pulled Petrucci's off the rack that weren't set up well, and I've pulled some that couldn't go out of tune no matter how much I Vai-Bombed them to try to knock them out.
Conversely, I've had the same results with just about every Floyd concoction out there.
Heck, I toured with an Ibanez with a Lo-TRS that performed flawlessly.
It's not always the hardware itself, sometimes it is, but not always.
Well setup nut, clean/lubed knife edges on the base plate of the trem. Good springs like those found on the Floyd site or at FU Ugrades.
Some cheap trems can be set up this way, but there are always more factors than just the trem, and most folks that hate Floyds, or even trems in general either don't know how, or don't want to know how, they just want the results.