Personally, I have no idea what type of complexity is involved in packing it into a confined area and so it boils down to normal experience path. It can aslo be likewise argured that there was a significant lapse between what was put on a ship until they got it into the F-15.One thing the article I think doesn't mention is the fact that China has had experience with AESA for ships, AEWC, and some ground based radars prior to coming out with their AESAs for fighters. Of course, I can appreciate operating in different bands and on different physical scales might cause a difference, but I think they definitely do have experience to draw on that could explain what is claimed regarding chinese fighter AESAs.
All this indignancy can be done away immediately If there is a bit more transparency on the Chinese side. Speculation assumes a void in the absence of facts.