Just got back, we were there 8/3-8/9, just 2 adults staying at POR for our anniversary. When we first got in, we felt the crowds were noticeably lighter, in fact last Sunday our arrival day (super early flight) we didn't do lightening lanes and had a wonderful day in MK (we didn't do many headliners). Every other day we had either lightening lanes, premier pass (at AK which was much more affordable) and we did the 2 after hours at Hollywood and Epcot (Hollywood was worth it, Epcot was not IMO if you like rides and charachters). Epcot is more a dance party and TT was down most of the night. We did a lot--but we were paying top dollar, so put that in perspective. The heat got us more than the crowds. The crowds increased through the week--and we saw almost as many international travelers as American. I think Disney does a strong marketing campaign, particularly in Europe to entice a lot of August travel and they often come over in larger multigenerational family groups. Although we enjoy the diversity, we found they would often crowd out the quiet pools (difficult to find a chair even in the quiet pools, larger families with lots of kids playing ball in the pool when you maybe just wanted to peacefully relax, I got hit in the head with beach balls several times, lol.). We were VERY lucky on rain--but that is changing now with lots more coming in. The bad part, is when it doesn't rain, it is even hotter, and the heat was absolutely next level. We were having a very hot (for us) summer in the midwest and we trained for this by hiking almost daily, no matter how hot or rainy it was here...and nothing prepared us for Florida heat.
Some tips--Remy, DO THE SINGLE RIDER line, no one seems to know about this, despite cast members announcing and encouraging it, but your que will be AC and it was basically a walk in our experience while the outside hot que was a 45 minute.
The new Test Track is amazing! However, if it rains, it is going to be down. During the after hours, it closes an hour before the event ends normally, and it was down for technical difficulties the first hour and a half of the after hours (we were surprised they still closed it early, it was really only open about 40 minutes, but we got to ride).
Pack your patience and understand what you are getting into...with higher international travelers there can be cultural barriers, larger groups want to stick together making it more challenging to navigate crowds, language barriers, and folks may not understand or know how to do Disney as much as those of us who go often know. Overall, we had a great time--but we paid for the upcharges and trained for us--if we didn't, I don't think my review would be as positive...