that is true, most decent lcd's will let you get away with 60-72 hz but usually in the standard form of VGA, whereas multisync (most after the mid 90's) vga could handle pretty much anything within its range (analog, gotta love it)

I have a "model 1" nec multisync, it handles ttl monochrome to RGB to 800x600 24 bit svga @ 58hz (and it really hates that) but my year 2000 20 inch mitsubushi lcd freaks out at many fullscreen dos modes, and even standard text mode is weird while also being cut off on the left