This is the guy I was looking for yesterday when all I could find was the Japanese beetles. While I was watching this critter a bumblebee flew into the web. Surprised me at how quickly, 2 or 3 seconds, it was able to reach the bee and start wrapping it. You may want to check out my entries for July 18 and 25th. In the first (even though a bit blurry) you can clearly see the bumble bee. Less than a minute later all you could see was the white "sac" and the spider went back to an earlier meal.
Like your new profile pic, by the way!
And "fast"it was!