That statement is nonsense.
I'm no suspension expert, but then neither are you muppets, you take one persons word as gospel and assume they are right and everyone else is wrong. I dont know what camber settings you should run, but it makes sense to me that as every setup is different with different dampening etc then I dont see any logical arguement to support this "so called" fact that no more than neg 1.5 is needed. So while what I put may well be nonsense I'd like an proper detailed explaination as to why purely for my own understanding, as Pro Sport obviously know less that you guys... as do the people that setup Peperami's and whoever elses.
Oh, just one more thing (Columbo style), Northampton Motorsport are Cambridge Motorsport, aka Mass are they, I get confused.