Did the one in June and had the same issue as you, too many injuries this year and knee would not let me run.
Swim was more like 1750 than 1900 (or I was well fast) lovely clear lake, bike is about 53 miles 2 flat loops except for 1 big hill and 1 small hill shortly afterwards.
The good thing if you are worried about the run like I was, is that its 3 loops so you never really get far away from the start/end. I ended up walk after about 5 miles as my knee would not let me run, supporters/marshals were great and although when I wandered in after 2:38 on the run I obviously didnt look like I was competing as the photo bloke just stayed chatting to his mate as I crossed the line lol. I really enjoyed it (nearly entered the Aug one then and there). Will be back in 2013 to do it properly. Was cool for us until the run in June, hope its not to hot, do it enjoy it, come do it better next year. Best of luck.