Actually it is about 50/50 now. EXEL started with DM and then added CE. DM was the mainstay for many years. CE was added in about 96 to make EXEL the dominate functional genomics company it is today. There are unique advatages to both and EXEL capatailzes on them all. They are both very powerful model organisms, but they are not the only ones in the EXEL arsenal. I know this to be true b/c I used to be a research scientist there in the Genetics group. This is a strong company, with many talented people that will go the distance.