Yeah, have to say I agree, nervously used my Inov8 trail runners for the first time on a 7 munro day in Lochaber the other weekend (with a slightly heavier than average rucsac also).
Apart from my choice of socks (I wore thin running socks, would have preferred something with a slightly thicker sole) I had absolutely no issues with them, I went over on my ankle once or twice but between the terrain, my fatigue at the end of the day, and the fact that I do that anyway with ‘proper’ boots, I wouldn’t pin that on the shoes.
I had bought some calf length thin Sealskinz for any boggy approaches as I’m still not man enough to squelch about in wet shoes all day but happily that wasn’t necessary last weekend! 8)