Don't get me wrong, I think he's perhaps the best target man in the world in a 4-5-1, but in this system, it was more about Drogba setting up Lampard rather than Drogs scoring himself.
Since Jose switched to 4-4-2 (first Drogba-Crespo now Drogba-Shevchenko), Drogba's performances have been superb, and he's been scoring many more goals. By contrast, Lampard has scored fewer.