btw I don't use the standard 2h Agi enchant on my 2h for all this testing.... I have 3 windwalk enchants, 1 on each 1h and the 3rd on my 2h staff (more accurate testing that way, plus I like the dodge even though it's a proc and not static). Again, 2 windwalk enchants will mathematically have a higher uptime than just one, given that it is a PPM. They don't share a CD with each other, so you can have 2 proc at once, and they don't have an ICD (hence the refreshing in my tests) which can cause them to seem like the proc rate is higher than normal, but when looking at the course of an entire fight (and not just minute by minute) the average PPM per enchant remains the same whether it is on a 1h or 2h, 2.6 speed or 3.0 speed, haste effects, etc.
oh also, did you read my post after what you quoted? added much much more info after that line