Some nfl numbers from last year. Line movement up to 7.5, dogs were 8-5. Line movement down to 6.5, dogs were 8-6. Line movement up to 8, favs were 4-1. It would appear that there are 2 different answers, depending on line movement, fwiw..
I don't want to sound rude, although you've been here since 2002...you should know by now...to answer your question it all depends on the circumstance. Also it depends what team you liked prior to the movement.....plenty of circumstances....and sports.