There are several actual, verified, members of the military on SIG Forum that are issued M11s and have used tem in combat in Afghanistan and Iraq. I know the site catches hell on this board, too much IMHO, but I'd ask there. A couple have had M11s issued to them since they first came out, and they just got replacements in the last 4 months.
All of them are very happy with them. There are some estimates of how many rounds have been fired, and all you can say is "damn".
For the record, I put my P228 through a mini torture test at the most recent Hun Farm event , in November. I let the gun and mags(17rd Mec Gars) sit in the bed of my truck at nights, where dew would cover them. Then I would take the pistol and mags out and fire them in the morning, all were flawless. When I drove around with my P228 hanging out the window, capping wabbitts, it would get coated in fine red West Texas dust and dirt. The "extended capacity" Mecagars didnt fare so well, but the 15 round mags did, 100%. I did this for three straighty day, feeding it over 1000 rounds. I forgot to clean it for a week, but to my surprise, no rust.