This is an old thread, but I thought I'd touch base again with my experiences since the original post.
This year I've invested in two pairs of trail runners. The Inov-8 X-Talon 212s were purchased primarily for actual trail running (crazy, I know) but have proved themselves quite capable on a few day walks, including one rather muddy climb up Bishop and Clerk in early spring.

- Inov8 X-talon 212
The 212s are a very much minimalist design, weighing barely over 200gm (size UK10.5) with a 6mm heel offset, basically halfway between traditional runners and minimal/zero drop shoes. The sole design is very aggressive and unsurprisingly gives awesome grip on loose/soft surfaces, wet/cold rocks less so. Sheds mud quite well too, though I have to admit feeling more exposed around the ankles than usual took some getting used to. I've since invested in a pair of neoprene gaiters to help keep the uppers free of mud. The sole itself is very thin and flexible, giving a huge amount of feel underfoot, almost disconcertingly so at first but you quickly get used to it.
In addition to several walks I've also put about 100km of actual trail running on them... they're great on soft trails but a combination of hardpack running and some issues with my right hamstring eventually resulted in ongoing knee pain requiring I put them aside for the past few months while I built up strength in the weak muscle. Whether it was the shoe's minimal support, low heel, squishy lugs, an increase in both pace and weekly training mileage at the time or just the said weak hamstring to blame, I'm not entirely sure. In recent weeks I've been slowly integrating the shoes back into my training, with no issues thus far, and am hoping to run in them a 12km event at Greens Beach this Sunday. Probably more of a running than hiking-specific issue, but nonetheless, bear in mind your feet will need to adjust to a different style of shoe.
The other pair are the Inov-8 Roclite 286GTX. These are unique to the Inov-8 line, being a mid-height, waterproofed/Goretex'd boot aimed at hiking rather than running/scrambling/Crossfit etc. Despite their visual similarly to 'regular' hiking boots they are still very much minimalist shoes, with a similar grippy, flexible sole, low heel offset and no real 'support' in the upper or ankle. The fit is rather narrow - what Inov-8 call their 'precision fit' - which at first felt worryingly tight across my wide-ish feet, but having figured out how to lace them properly (aka - fairly loose) plus a bit of wearing in they now feel comfortably snug.

- Inov8 Roclite 286GTX
Other than some regular casual wear, the Roclites have so far only seen one serious walk... an overnight hike on the Badger Head-Copper Creek track. With a rather un-UL pack weight on my shoulders (about 15kg, including several litres of water) the boots carried me comfortably and securely. Track conditions were dry for the most part, a bit of mud but nothing to test water resistance, nonetheless the tread pattern (similar to the X-Talons, lugs are a tad shorter) held well. I have to admit I really much prefer the all-black look too, versus the lary colour scheme of the trail runners.
The only real negative I've come across so far is that the Roclites are definitely warmer on-foot, not breathing nearly as well as the very open, breathable X-Talons. To be expected. As such, I foresee the runners getting more use over the summer, whereas the boots will be saved for the wetter/colder walks.
Cheers, Ben.