I haven't read much about pp but syngonium are real bad about growing out of their color...
I have seen a couple pretty big ones, leaves 10" long not counting the petioles, it was pretty clear that there was less if the splashed look, the variegation was expressed itself with large sectors of the leaf, or half green half pink leaves, even all pink leaves, it was much more dramatic IMO, and was much more noticeable from a distance...but there were also a were plain dark green leaves mixed in, I didn't notice any in the lower younger growth they seemed to only be growing in more mature section of the plant...
