PNAS members didn't undergo peer review. Do they now? Perhaps it's a bit better, as I mentioned they changed their submission protocol. They used to consider having another member glance at the paper "peer review". Which in the case I cited, meant two members can review one another work with an understanding it always gets passed. Normal peer review its sent to anonymous scientists and reviewed. That was not the case at PNAS.
TBH I'd really be shocked if PNAS membership does not confer a publication perk. If it's now like a normal journal and all papers undergo anonymous peer review. ALL work is treated the same regardless of WHO submits?!?! I'll eat my pipette!
Regardless, in the past if you were a member you were considered to be such an exalted specimen of scientific prowess your work didn't need normal peer review. That was the whole point in being a member. You simply published in PNAS.
Lastly, while peer review sounds fine in theory and appears to be impartial that is not how people work. For example. My buddy I went to coffee with is published in Nature (when he was a postdoc). His boss got a call from a mate over a Science one afternoon. They had received a publication that was under review that would scoop their work. He got on the phone with an editor for Nature. He sent his data in Nature format that same day, it was reviewed (by someone people?) Saturday and accepted for publication on Monday.
I'm not saying the process isn't decent, but it's far FAR from perfect.
IMO we should have a website were we (we I mean everyone) run experiments and simply add the data to the site on a weekly bases. Much like Sciforms, you'd soon realize who is what kind of scientist. Whose data you trust. Who you can trust to ask for advice or technical help. Plus there'd be a record of your idea as you had it on the day you posted it.
As it stands now some fields are friendly and others are filled with arseholes. It takes awhile to make the "right connections" if you do move laterally.
/rant/