I'm so sorry I made you feel like that - I was not talking directly to you but putting my opinion to everyone.
I'm sure your trainer is great at training dogs - all I said is that they are not a behaviourist.
I most certainly don't think you are stupid - I wouldn't spend time replying one to one with someone I didn't think could think for themselves.
You are right that all dogs are different and each has different levels of instinct, different upbringing etc etc.
I do, however, feel that I have to push the point ( I can hear everyone groaning, "No, don't do it!") that the method described for house training does not work, nor can it.
Hope that has cleared things up?