Discussion about the Korg PolySix synthesizer

Hi,

I don't have a Polysix or MonoPoly (yet) but I was wondering one thing about the ARP on these two synths.  Assuming I have the ARP clock set to the rate that I want, either internal clock or external one, when put my hands on the keys, does the arpeggiation start right away or does it wait for the first clock?  I'm curious what happens if my timing is off and I put my hands on the keys at a time different than the start of the clock.