I don't often read into many of the stat weighting tables, but I do understand to some degree how they are created.
The world of min/maxing dps is a matter of science and precision. With any given class you can prescribe a standard, optimized talent spec and matching rotation, and usually the key to execution is matching that rotation as sharply as you can.
Using that ideal rotation you should be able to predict how much of each move you will use in a given time span and how each stat will influence your total damage. Based on that set spec, and expected ideal output of moves you can calculate just how much each stat is contributing and voila, relative stat values.
If you are a math-minded person you can probably do well by going to the source material (and I'd be reluctant to trust someone's stat ratings if they didn't link to their work and assumptions) and checking through their numbers.
On hit and expertise, maybe I can shed some light into why they get lower values on an absolute equivalency.
Hit and Expertise govern your chance not to connect, right? That chance is relative to target level, and varies for spells and melee attacks. For that they are gate-keeper values. They will increase the value of your other stats, but only so far as they reduce the times where the other stats are wasted. With no hit rating at all, against a raid boss, your melee special attacks will miss 8% of the time. That could generally be used to say it is reducing the value of your Strength by 8% (though there are other factors and Strength is not applied directly, but let's keep it simple). If the hit-reduced value of Strength *still* adds more total dps than adding hit instead to not lose value from the stat, then there's no reason (from a min/max standpoint) to add hit rating rather than Strength.
The same works for Expertise, though only against melee swings of course. For certain classes this may make Expertise less valuable still as it will only affect specific values in your damage output.
I have not read deeply into the math, but it seems to be fairly common practice for Warrior dps to stack ArP and/or Strength in every socket (depending on where their values fall). I take this to mean that someone has done the math to show that even if you have a chance to not connect you still get more increase with these stats. And gear you get will have hit and expertise on it, so you will not be up against a completely unmitigated miss/dodge chance.
I hope that helps. I've started dpsing more seriously on one of my DKs so I'm thinking I may actually do a comparison of this sort in the DPS forum. =)