Thanks to you both. 100 uA would still be better than many other regulators quiescent current, but I will just order one and see what the actual truth is.
And I should have thought about the Pololu forum myself, but I immediately thought of the Arduino playground as there are so many folks out there who have tried one thing or another, and have experience with parts in "real world" combinations. I will try to post this question to them there now, and if/when I learn something useful, I will pass it back to this thread.