It occurs to me that for stat weighting, skill speed is more of a break-point style of stat. In other words, each point of skill speed increases dps by a small amount, but when it reaches a high enough thresh-hold to produce a more efficient rotation, you get a significantly larger dps increase.

Of course, those thresh-hold values are going to be somewhat dependent on latency, but keep in mind that the stat weight values for skill speed probably don't reflect the increase from a more efficient rotation.