I ran the Gun Run for the fourth time yesterday. My time was 1 hour 51 minutes which is very much in line with my other half marathon times. The difference this time is that I wasn't hung-over, injured, detained by the other runners or otherwise impeded.
So, it looks like improving my time is going to be a lot harder than I thought. More interesting is how little impact those other 'disasters' seem to have had. I had guessed that they added 5-10 minutes to my time, but that is way overstated. I find that pretty surprising.