I know there is another thread on Lagat's 27:48 here:
http://www.letsrun.com/forum/flat_read.php?thread=6493525
but one thing everyone is missing in that thread and we missed as well in our article is Lagat tied the American record for 10k on the Words. Mark Nenow and Lagat are now the co-record holders. Thanks to David Monti of Race Results Weekly for pointing this out.
I didn't think Lagat would go sub 28:00 so I never thought to look up the American 10k record. Considering there are tons of 10k every year on the roads, and a 10k US championships it is amazing Lagat at age 40 got the American record.