I don't know what happened to my earlier stats, maybe v1's stats was lost. But I think I was consistently 200+ or 300+ a day once I gotten used to using it. Works incredibly well as a task switcher once you map a few key single characters to apps (like v/vMacVim, x/Xcode, i/iTerm, s/Safari, c/Chrome etc).
Just the hotkey for Alfred. I use Cmd-space. No app-specific shortcut. But after you press a key in the search bar, you can press alt-1 etc to make your selection. Repeat it a few times for the same key and the order of the results will be updated.