I'm not sure if this ever going to get updated.
Now that Axe has peephole optimizations, counting the speed and size of code is more complex and requires knowledge of assembly to take advantage of the peephole optimizations. But a big reason for creating this guide was so you didn't need knowledge of assembly to know how fast/large code will be.
Not counting peephole optimizations, most figures in the latest version of this guide (0.5.3) are still pretty accurate. If you have any questions about the speed/size of specific routines or blocks of code, feel free to ask.
EDIT: Maybe I should make a general Axe optimization help thread...