I have read many christian self-fulfillment books myself which I don't like. I haven't read Warren's book but it sounds like it's in that category.
The gospel is a message about redemption, not about life's purpose.I have nothing but respect for McArthur, but this statement is nonsense. If it were true, it would indeed make a pretty good slam on Warren's premise; but it is no more than a soundbyte, and a meaningless one at that.
I can see how some would see this as a petty argument from the silly issues that are being raised. I'm sure there is some valid criticism against TPDL, so why not raise that instead?
Warren's book is hardly a "self-fulfillment" book. However, it would be accurate to say that at least one of the book's theses would be that your self-fulfillment comes in finding God's purpose for your life, with the emphasis being on God's purpose rather than your fulfillment.
I am not a cheerleader for "The Purpose Driven Life", but I can hardly see how Christians would find the book offensive, or even unscriptural. It certainly has many, many strengths, and has helped many people. Is is perfect? By no means.
By comparison, Oswald Chamber's book "My Utmost For His Highest" is also a wonderful book which has been used in the life of millions. But it too, is not perfect.