That's the question BusinessWeek analyst David Welch poses as the company readies the unveiling of its new IS 250 and 350 in Geneva next week. Lexus is trying to beef the IS up with more horsepower and sexier lines. That shouldn't be too hard since the current model is ancient and underpowered. Lexus needs to speed up its production cycle if it wants to overtake the other sedan makers. Mr. Welch makes one misstep saying Lexus makes money off SUV sales and that large SUVs are trailing off. While that may be true Lexus' big moneymaker isn't a large SUV it's the RX330. A mid-size SUV, a growing segment.