"Nones" have jumped to 22.8%? Wow! I just want to see "Nones" enter the mainstream, which is what I think they are in the process of doing.
I'm sure that regular church attendees are overwhelmingly 60+, and it'll be interesting to see if this trend continues.
The survey doesn't remotely agree with your assertion.
EDIT: Thought: maybe the speed with which None is raising also has to do with increased comfort among lapsed/non-practicing people to embrace the None label rather than continuing to identify with a birth religion they don't practice anymore.
While there was a genuine decline in the number of believers, a lot of the decline is non-practicers going nominals. (Did anyone really believe that 75% of Americans were actually Christian?) This of course isn't good for the religious, but it's not quite so bad as mass apostasy.
Overall, not a good result for Christianity, although I can take solace that the Evangelical branch of Presbyterianism is gaining on the mainline branch.