Yes, the Radias can do it too. Seems it's native to Korg VAs.

However, I think Access pinched the idea from this thread and incorporated it into OS v2 of the Virus TI under the "Wavetable PWM Oscillator -
Takes two instances of the same wavetable and phase-shifts them against each other to achieve an effect reminiscent of the traditional pulsewidth modulation of a pulse wave oscillator.", as shown on page 8 of their OS v2 addendum: http://www.infekted.org/virus/files/AddendumOSv2.pdf

Which is exactly as described here.