I recently switched back to Terminal.app due to poor performance in iTerm 2. Keystrokes were lagging to the point it got frustrating. Then a few days ago someone pointed out that I should try the iTerm 2 nightly build, and sure enough the lag is gone, so I'm now back on iTerm 2 again.
Don't worry George your responsiveness more than makes up for an honest mistake.
To everyone else: I would highly recommend if you make money on a daily basis using iTerm2 that you support his efforts:
https://www.patreon.com/gnachman/posts
Before you ask, yes I'm a patreon for George, his work inspires me.