Defences Compared

I looked through the defensive statistics of all the races that start with "A" in the Monster Manual. Here are my findings:

• Will is always easier to hit than AC. On average, Will is 4.222... lower.
• Reflex is almost always a better target, with only one instance of a higher Ref than AC. On average, Reflex is 3.62 lower than AC
• Fort is the least advantageous of the secondary defenses. It's equal to or worse than AC almost half the time. Despite this, it's still 1.5 lower than AC on average.

This isn't a sampling of all the monsters, but 27 of around 300. I think that's a pretty good sample size. I doubt that monsters that start will A are aberrant statistically.