First of all, it's interesting that this information came to light as a result of a slander law suit...something that basically no baseball players brought against guys like Canseco. Does the fact that no slander suit was brought against Canseco coupled with the fact most of those Canseco accused ended up being proven of using steroids say anything about Wade's lawsuit? Presumably, none of those baseball players brought suit because they didn't have a leg to stand on. It's bold of Wade to bring suit (rather than just deny and let it go) if he is guilty.
However, it's naive to think there aren't PED's in Basketball. Nearly every advantage that steroids affords (strength, speed, recovery time, explosiveness, etc.) is something GM's and coaches look for in players. And basically every reason people say steroids would not help in basketball has a baseball analogy; obviously baseball was filled with the stuff and it clearly helped enhance performance. For example:
"steroids can't help with a jump shot" = "steroids doesn't help you time a curveball"
"Steroids don't help with agility" = "Steroids and muscle mass would make a hitter lose his quickness."