I have heard the same thing, but my source has a pair of his sticks and they are not 5A's so that is why I have 2A's as my reference.
I hope to be getting photos of the originals at some point so I can verify that as well.
The topic has been discussed and the debate is 5A or 2A.
I'm not a John Bonham collector, so not my area of research.
David