So far, quite rare, though it was also hard to come by during BW. I think OLM clamped down a bit after I got a hold of an entire BW episode’s worth of genga a full five months before the episode aired (they did contact me about it but there was no trouble, I just agreed to their polite request to remove them from my site until after the ep had aired) and is being much more strict about what leaks out. So far, for XY, I’ve only seen the genga I am posting on my site shortly, another Froakie vs. Chespin sequence I also own, and one page of Ash with Fletchling someone else owns.
Beyond that, only one or two episode’s worth of settei leaked for BW and so far nothing for XY.
Alright! Thanks for the info. :)