You're trying to convince yourself they are directional when several people have told you they are not, some have told you they seem not to be and you seem unable to find any data that says they are. You seemingly need/want to convince yourself they so you can have a row with the manufacturer that you're highly unlikely to win. You bought crap tyres and they were crap, you keep telling up that isn't the issue but frankly it is as the rest of your argument, right now at least, seems beyond weak.
Clear?