Their descriptions are really hit or miss it seems like. I've seen body woods listed wrong, wrong numbers of frets listed, scale lengths listed wrong, etc. So it wouldn't surprise me if they were wrong about the number of pieces in the body.
on one of the factory tour vids it claims that ALL lps have three piece backs and shows them being glued up. whilst this obviously isnt the case it does seem from most peoples ngd pics etc that the vast majority are three piece at the moment - my 50s studio certainly is.
Maybe this is apples and oranges, but my Studio Faded is a one-piece. I can't find any seams on it at all, back or sides. Certainly not the "cutting board" look that some of the Studio Tributes have...
Checked out a studio 60's in store this past weekend, it had a 3 piece back. The studio 60's SGs that were there were 4 piece. I guess thats why they can sell them so cheap (compared to standards, etc.) Really nice guitars though. Love that P90 sound. I wouldnt hesitate to buy one based on the number of pieces that the back is made from, if it sounds and plays good thats what really matters. Its not like paying 4k for a custom shop RI only to get it home and find out that its not a one piece back. They are selling the LP here in Canada for $850 and the SG for $815, at that price if it sounds good its a keeper.