Probably, and then I usually check the loads before I make plans to travel. I also travel early AM or weekends. I had a miserable flight from Atlanta to Houston because if being squeezed into a seat next to a blimp but it was just a two hour trip and she was pleasent enough.. (I sat on her lap and we chatted the whole way..Not really) I had the window seat...
The absolutly miserable flight I did take was 6 years ago when we flew from JFK to TelAviv and they had added seats I am sure. There was absolutly no leg room and reclining was impossible..
People have asked me if I would ever go back to Israel and I would if it didn't mean 10 hours on the plane. I got there and my legs were swollen. The same size from top to bottom. They stayed that way for 24 hours. The trip back was almost as bad but had a young woman and her baby across the isle and I helped her with the baby the whole way. It helped kill time and the flight didn't seem as long.