Bloody good and well done to him and the team - having met him (professionally) on a number of occasions in previous pre-racing incarnation, he was a good, courteous bloke with the right interests at heart; having met him a couple of times since he took up racing properly, that doesn't seem to have changed. Ok, he's a businessman who is savvy in all sorts of ways, but that he continues to progress and, as a privateer, has managed to progress from newcomer "amateur" gentleman driver/team owner to where they are now is good to see, and the race results on their website show a continuing upward curve from 2008 to the present.
On the "when did Lola last win a top flight sportscar race outright in the USA" question, I'd hazard a random guess at the IMSA GTP series of the 80s/early 90s?
MG Mark