Lukewarm "Christian"?

I recently listened to a sermon by Francis Chan that was really interesting but also a little scary to think about. He preached about how so many in the Church today are lukewarm. It's easy to see that without being "judgemental". You can see it by their lack of fruits. They come to Church on Sunday, participate in corporate worship, pray, and often drop their tithe off in the plate. But then Monday - Saturday they are doing their own thing. Whatever pleases them. Gossip, fornication, drunkenness, and an overall void of anything Christ-like. Yet they have been justified in their sin by the false doctrines they are being taught. In an interview, Francis was asked, "do you really think God is going to spit lukewarm Christians from His mouth"? His reply was that he does not think there is such a person as a lukewarm Christian. If they are lukewarm, than how can they be truly saved? Different opinions exist on this question, but if we take away all the man made doctrines, and look at the Word of God in context, he may in fact be right. What do you think? I think if you are lukewarm, you better examine yourself. Don't worry about whether you have been saved or not. Repent and believe in Christ. If you are truly saved by God, you will be a different person. We will know it by your fruits.