I'd recon that would be about right mate.
Mine was good as gold but then he was always working.
Back when i owned mine and had a massive interest in the breed, i knew of almost every BT in about half of the city. Most of them, including my dogs half brother, had bitten someone in the household.
There was a lady that lived down our street who had one, they had it for most of my life but i never seen it. The street i grew up in, was a typical terraced street of small two up two down houses.
This lady, Mrs Crutson, always looked out of place living there. A slim, sexless shrew