Prior to visiting Orlando, I had been following this thread for a year, growing increasingly anxious with each post. I decided to register so that I could share my experience and (hopefully) put some minds at ease.
I visited the WWoHP around the 4th of July holiday and was able to ride Forbidden Journey multiple times. To give a bit of background, I'm a female, 5'6" and roughly 300 pounds. Needless to say, I'm a big girl; however, my weight is fairly evenly distributed. I wear a 24/26 in pants, a 1 or 2X in shirts and a 44DDD in bras.
I didn't try the test seats. I sincerely doubt that anyone would have been paying much attention to me as they hurried to the ride, but I was too embarrassed to try. Inside, I wasn't pulled from the line any of the times I rode. There's a spot close to the boarding platform where test seats are located. Employees stand on either side of the queue, probably to pull people from the line as needed. I tried to hide amongst my family members and remain inconspicuous. Luckily, the employees weren't watching very closely anyway.
At the platform, I hurried to one of the modified seats, and my husband quickly pushed my harness, getting three clicks. It was a tight fit, but I was able to ride, and the team members helping guests board didn't seem to mind that DH gave me the extra push I needed. This is what we did every time we rode, and there was never a problem.
I hope this eases some worries. If I can fit, I think most people reading this thread can, too!