Sales targets are often more for general sundries. This is why people will push a Monster HDMI cable onto you. Don't buy these, people have replaced the cables with coathanger wire in tests and the customers still couldn't tell the difference. However, a £100 cable carries more profit than a £400 TV on average, especially if the TV is on sale. This makes them essential for keeping your Profit Margin targets afloat.
Comet thankfully don't exist, but Currys' aren't much better. I worked for a smaller company that only exists in East Anglia, and to be fair they did handle training extremely well, especially during refreshes of models every April and learning what new gubbins were all the rage. (When I was there it was 3D, which flopped, then Smart TV, which apparently held on despite the interface being generally horrible using a remote.)
Panasonic were probably my preferred brand, though Samsung were a close second in terms of straight quality. I can only dream of owning a Panasonic VT series Plasma, those things were gorgeous and are now rare as hell due to PS replacing all their lines with LED-LCD TVs. The only thing that could beat a Pioneer Plasma, IMO.