urgh, that's why I hate it when people bring out parsers as proofs rather than as raw numbers. FFlogs proves nothing. It ignores all the situations. Paladin tanking more in shield than sword because they lose a GCD, do not have infuriate-like skill when they have to go back to tank stance if they dance, paladin not having SE...
on your AS1 example, WARs can tank it with 0 damage penalty during the entire fight. that's not the case for PLDs
Not even counting the fact that FFlogs rely on parses shared by the community, not on ALL datas from every single player out there. Nor the fact that there are much more parses from WARs than from PLDs.
The parsing tests conducted in the pre-AS days were showing PLDs at ~900, DRKs at ~950-1000 and WARs at ~1050-1100 (in equal conditions, i.e with constant SE or equivalent debuff on the dummy)