Apparently, jet lag plus wind and heat plus half marathon doesn't equate to PR in a half marathon. But, I did get my second best time, even if I did run the last five miles significantly slower than the first eight. I did as well as I could, and I was just tired!
According to my Garmin, I came in at 1:46:26, which is about 3 minutes slower than my best, and 3 minutes faster than my second-best.
Here is my Garmin summary: