Figuratively. If any amp worth their salt gets the LCD2 at a theoretical 90% of their potential (i.e. $100 Magni), and you compare it to a $1000 amp that gets you to 100% of their potential, well then... do I need to do the math for you?
The LCD2 is no HE-6, no HD650, no HD800 in terms of amping.
But people will spew hyperbole just to justify spending so much on gear.
There are improvements there and so very real. No FiiO / O2 amp is gonna make these (or any good $1000) headphone sound their best (and many times they can make them sound much worse). Cheap starter amps like these are a non-starter for me and won't get you anywhere close what the LCD-2s are capable of. The LCD-3s are much tougher to "get right" as well. The LCD-2s have the benefit of "sounding nice" with a lot of gear, but why spend $1000 to hear "nice sounding headphones"? Just pick up something much cheaper and save your money if that's the case.
My comments are from my first hand experience with FiiO amps, O2 amps and then much better gear (GS-1, B22, WA22, LF, GS-X). And the differences are much more than 10%. First off the LCD-2s are orthos and a few milli watts isn't going to cut it. I would say about 2W into 50 ohms is about right. Then there's the quality of those Watts.
But to address your last comment, I often find that those who say they can't hear differences are ones with little/no first hand experiences, or just "heard them for a few minutes" at a local meet. I can hardly tell differences between headphones at local meets and find them more social gatherings than events to truly evaluate gear. That takes several days (and ideally a few weeks).
Edited by MacedonianHero - 5/4/13 at 3:43pm