Not always the case
i've got 2 business class seats for me and Mrs Tezzer to Dubai in 4 weeks time. Only problem was availability from manchester, so having to go from Newcastle, and as we live outside of the chauffer drive radius for both airports, there's not a lot of difference.
The downside is that they have the A300-200 on the NCL route, with no ICE, just the 15 channels of TV/ Movies, so a bit 2nd rate, these days.
As for TG, your right. I booked 2 1st class seats, last year, LHR to BKK, and we had the entire cabin to ourselves, very nice indeed. Mind you, couldn't persuade Mrs. Tezzer to take, advantage of the "solitude", so I took advantage of the newly opened bottle of JW blue label. All was fine, till I got to the top of the escalator at Kings cross station, and plummeted to the bottom, mid rush hour. What made it worse was I accidently hit Mrs. Tezzer across the bridge of the nose with my laptop bag, as I plummeted helplessly past her.