Social workers probably can't understand this plot (just kidding!), philosophers are great with language (ever read philosophers? They use their skills for evil), and math and physics majors have great quantitative skills (no surprise there). Anthropologists (blogged about yesterday) and psychologists are not so good at math (art and performance majors outscore them in quant for god's sake - is this why these two fields are filled with so much woo?). Unfortunately, education majors all seem to be below the mean.
Earth science (my field) and biology are middle of the road. Pretty weak in quant when compared to hard sciences like chemistry and physics and those in technical fields like engineering and computer science. Of course these are generalities. Someone majoring in geology but going into geophysics, for example, would have to have great math skills. It's a liability for field geologists, on the other hand, to be very bright (they actually enjoy wearing the same set of underwear for weeks on end and have killed off most of their brain cells with alcohol).