Yoshi P talks about Warriors- from Producer Letter Live @ TGS

[CurlyBruce]

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Funny thing about data points is you can't just use 10 groups of 200 samples and call it 2000 samples. He keeps posting his Crit Rate and DPS against bosses which aren't alive for more than 10 min, but why doesn't he just go smack on a test dummy for a while. If he really wants an accurate sample of his average crit it needs to be in a controlled environment where no other factors come into play. Go to Coerthas, Whitebrim. Smack on a level 50 Test Dummy for 42 minutes (2.5GCD * 1000 = 2500s / 60s = 41.6min). You'll get at least one auto-attack between each ability so that will give you a sample size of around 2000. Initiate the fight with Infuriate and spam your butcher's block combo (this is to keep wrath at full and has the added benefit of testing whether the damage calculator is accurate by not diluting the test with Maim bonus or Storm's Eye). Spam Internal Release whenever it's up. Post parse results.

For the record I parsed my crit rate without Wrath V or Internal Release with just 30 extra crit rate and got 7.22% which matches the Valk-Dancing Mad calculator. As far as crit rate from the actual stat goes it's accurate. The only thing that remains to be seen is whether % Crit Boost from abilities is a flat bonus or a multiplier. Judging by the fact that other abilities that increase a stat by a % (Berserk/DivineSeal/Foresight/etc.) actually update the character screen to show the new stat I would argue that the % Crit Boosts are a flat boost which is why the calculator is wrong when you add those in. Of course it's all just conjecture until someone parses it properly.