RE: Break in Future Problems..
It's probably OK, but perhaps a bit more worn than it should be for that amount of use. Keep in mind, some of the time, you may have been running much hotter, but didn't know. It changes with the weather.....chuckle.
Also, it was probably running rich with it that cold, so you had lots of lubrication. That's a good thing....see?...the glass is 1/2 full !!!
Con-rod? If I wwere in your shoes, I'd just re-tune and keep on driving, however I've read on other sites where people change the con-rod as soon as the engine is broken in.....sounds a little too much for me........