That's it. Looking at this and that, it seems to me that the B/X Elf gets hosed; even if we account for the extra abilities, it seems like the xp/lvl costs are close to twice what they should be. If any one has a solid explanation for this I'd love to hear it. SW WB is even more skewed, btw, but Holmes seems to be more in line with my thinking- unless I'm reading him wrong. I don't have access to the LBB's but talk about that stuff all you want in the comments.
This all has relevance to the stupid game I'm writing for the stupid setting I've already created.