Californian
Now I know that your not serious, athletes don't continue to improve their personal best ever year (especially when its the world record). I also didn't specifiy when he would run the sub 26:04 but I do believe that once he gets it down that far it will then take PERFECT conditions for him to have any chance at running faster.
Look at Paula Radcliffe she ran 30:01. two years ago and by your logic she should been under 30 minutes last year and I believe she can but once you get to a certain level improvement becomes extremely difficult.
VIPAM
A question to you and the poster Race a 1500, so do you think Kenenisa have reached his limit in the 5000m and 10000m time wise?