bale equals=21 goals a season, it's not like he creates anything for others when hes playing in the center. He's form coincided with a severe drop in defoe and adebayors output.
Actually Bale's form coincided with a significant increase in Adebayor's output. Adebayor was rubbish for the first 5/6 of the season, but really found his groove when Bale was on full blast at the end.