Newcastle have just beaten Spurs 5-1 - that is the third best team in the Premier League. If - and it is a big if - they can somehow convince Rafa Benitez to manage in the Championship they should be even shorter than that price
Spurs had completely imploded after blowing their title chance. That result means nothing. Can't tell with Newcastle yet as it depends on who stays / leaves / joins, manager and players.
I'm amazed Villa are so short. The club is a total mess from top to bottom and I reckon they are more likely to get relegated than win the title.