I had this friend, back in junior high, named Matt Bryant (his real name was Matt Bryant). He was (is?) a phenominal musician. He loved to go to the library and pull out the microfiches for old issues of Rolling Stone and other rock review magazines. It was cool to go back to 1969 and find out what jagoffs like John Mendelsohn thought about Led Zeppelin 1. The critics always hate the really good bands when they first come out.
Rolling Stone took a long time to make their album reviews usable online, but now they've gotten it right. Check out their archive of reviews. It's hard to search, but you can find the real gems if you look:
Here's a tidbit: "In their willingness to waste their considerable talent on unworthy material the Zeppelin has produced an album which is sadly reminiscent of Truth. Like the Beck group they are also perfectly willing to make themselves a two- (or, more accurately, one-a-half) man show. It would seem that, if they're to help fill the void created by the demise of Cream, they will have to find a producer (and editor) and some material worthy of their collective attention."
This review came out in March of 1969, so your mom had plenty of time to tell me about it.