All 30" IPS monitors made to date have been LCD CCFL until just recently as Dell announced their new U3014 LED IPS display (which hasn't released in the U.S. yet). All the korean monitors are LCD despite some claiming they're LED. I highly doubt Monoprice is using the A- Dell U3014 binned panels.
CCFL has less of an issue with PWM flicker and sometimes has better uniformity. People act as if LED is superior by default, but the details can matter.