Not that as a Rockets fan, it seems to be completely helpful (second place in the division, fifth in the conference), although they are 21 - 12 with him and 13 - 9 without him, but apparently using the most up to date statistical methods, Shane Battier is one of the big keys of the team.
Yao's numbers (he's been healthy this year, apparently) 33 - 19 with Yao, 1 - 2 without Yao.
T Mac: 20 - 15 with him 14 - 6 without him
Artest:28 - 14 with him 6 - 7 without him
Seems like Artest might be the most important to winning for the Rockets, at least this year. And T Mac has gone the way of Stevie Franchise, as far as worthlessness, apparently.