I had the same experience. I used to enjoy reading his blogs and I was pretty much ready to sign up to use his BAs, but I had a phone conversation with him and found him to be very arrogant and condescending.
Also, I felt like he was talking to a script and I asked a few challenging questions, he got very angry. At that point I realised I didn't want him on my team.
Some things never change.
You should have also asked him how he produces his feaso numbers with his developments.
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