I had this happen also.  Over 20 years ago I had a reading with Sylvia Browne, at her peak.  She named names and I thought it was amazing.  I waited years for everything to play out and not a single thing matched up.  Zero.  It was recorded on a cassette tape and sent to me so it wasn't like I didn't write it down or missed something.  First and last time I ever clung to a reading. 
Anyway, I'm not sure how long after, maybe a year, I booked a reading with her son Chris.  My opinion was the reading was awful.  At one point I considered thanking him and ending the call.  I thought this guy is just riding on his mother's reputation and getting her overflow clients.  I didn't bother listening to the reading again when the tape came.  What for? Big waste of money.  
So a few years go by, no other readings with anyone, and I'm in a taxi approaching my office building and I notice something about the building that I see every day, but this time it triggered a memory of my reading with Chris and I'm hearing what he said in my head and thinking OMG. He had described a unique architectural feature and the exact business this company would be in.  I was rolling my eyes when he said this because it wasn't realistic at all and I couldn't imagine it ever happening, but there I was, working in that exact building in that exact business.  I dug up the tape of his reading, listened and realized one thing after another had happened just like he said over the past few years.  It wasn't 1,000% but it was pretty amazing.
How much did you pay for a reading with Sylvia and Chris? Was his reading better than mom's?
Nothing, and I mean absolutely nothing, Sylvia told me came to pass.  She named names but not a single thing went the way she said it would.  At the time, I was in a very long term relationship, one that I was thinking of ending, probably around the 10th year when I spoke with her.  She told me his name but everything after that was pure B.S.  I literally stayed in it longer because of what she said.  My reading was somewhere around 1997, maybe 1998.  I think it was $400.
I think Chris was $300.  Right off the bat he tells me the exact opposite of what his mother said about my relationship.  I had a lot of faith is Sylvia and believed her to be genuine.  I think for many years she was but it slipped away as she got more and more famous.  After that, it was all produce, produce and not a spiritual thing.  Anyway, when Chris told me the exact opposite of what she said, I pretty much discounted everything he said.  It wasn't until I had that moment of recognition years later that I dug out the tape and listened.  So many things he said had happened.
So, Sylvia 0%, Chris about 90%.