The F510 test is quite severe, basically removes a window and frame. The Global cabin rises at about 800-1000fpm on the test.
Are you stating that with a window blown out at FL510, the Global cabin
only flies up at 800-1,000/min?
I'm not stating that you are wrong, but if it is true it is very difficult for me to comprehend.
Also, if it's correct, what is the big deal about a decompression at 510 in a Global? Jeez, if that's the case one would have plenty of time to go to the lav to sh1t oneself in comfort before trying to get a mask on!