No. You have to look at consistancy and growth.
LBP sold really well. 5.1 Million
LBP2 didnt do as well. 2.8 Million*
What this shows is that LBP was a title where you either loved it or hated it. There is no growth and the second game sold a whole lot less. It holds an average of ~3.95 Million per title.
GoW sold 4.4 Million
GoW2 sold 4.1 Million
GoW3 sold 4.5 Million*
This shows the game is very well recieved by the audience it targets. Its consistantly selling over 4 Million units and currently experiencing growth with GoW3 being the best selling game in the series. It holds an average of ~4.3 Million per game.