I think alot of us on the board, laker fans or non-laker fans, have both said that he doesn't play great defense for any length of time. Nor has he been deserving of some of the defensive awards he has recieved. The second year the Lakers won the championship he played really good defense the entire year but it kind of dropped off from there yet the awards did not.
Lurker I think you have it right. I think what Tex is saying is that Kobe feels that he needs to be stronger on the offensive end for the Lakers to be more competitive. It is lazy in the sense for conserving energy like you said. Right now, I'd say that is true. Even if Kobe started playing real good defense for 40 minutes instead of the last 4 minutes of the 4th the Lakers as a whole as not a very good defensive team. It def would help and maybe everyone would play harder D if he did, however I think the Lakers lack defensive minded players as a whole. Kobe is not a defense first player and everyone else on the squad is not (Walton=pass first, Odom=Pass first, Cook,Radman,Smush=offense first). Even Sasha who is one of the Lakers better on ball defenders is an offensive minded player. It is a catch 22 for Kobe, if he played harder defense but they struggled on the offensive end he would need to shoot more. If they struggle on the defensive end then he needs to step his game up, even if it means the offense suffers.....in which people would say he needs to shoot more. Personally I would love to see him step his defense up and let the Laker offense suffer a bit. IMO in the long run they would be a better basketball team.
One HUGE knock i've been saying about him all season long is that he is very lazy at boxing players out. The guy could have 8-9 rebounds a game easily if he would box players out. I cannot tell you how many times PER GAME that I see him not putting a body on a player.
edit: Also to add Phil Jackson talked about it before one of the Laker home games a few months ago and he too has said he feels Kobe's defense this year is not quite what it was been in past years. He says he knows that it is due to the fact his knee is not once what it was and his lateral movement on that end of the floor has been changed. That one man zone comment from Tex Winters seems to point to that also. He is playing a weaker, lazier offense that gives him more time to react to a move made by a player.