I pedal "toes out," and my heels strike the cranks before they clip the frame(s).
(MileHigh, the only part directed toward you below is my own experience with hitting cranks, the rest is toward the guys who influence the industry)
With a BB30 crank, you have the fortune of a narrower stance because your pedal arm can move in toward the narrower spindle. On my CAAD10, I hit the chain stay before my crank. I also experienced good crank clearance on the BB30 Kuota Kult. My stance will have to move out when chain stay moves out. Most manufacturers will not do a drastic S-bend (see the Franco bikes for example). The S-bend presents a slight loss in stiffness when the rear wheel lurches forward, compression loading the tube (unless weight is added to increase stiffness back to the same level). I used to have a signature quoting something like "we don't just need change, but change for the better". This is a great example of why this quote exists.
I like how the threshold has changed. When discs for cross first came out, I pointed out that it is inevitable for road, needed or not. When I predicted the spacing will change, the response was that we can fit in a little disc as is. The momentum is moving toward making my prediction right and we now will have to move the spacing to mountain bike width. We are supposed to accept it because the chain stays might bend outward at the dropouts? When that does not come into fruition, what then?
On a mountain bike you are not stationary in one position for hours on end. You move around out of necessity. On a road bike the change of stance will be noticeable. This is something that we should voice concerns about NOW while manufacturers are having high level discussions. The product managers need to figure out how to do a little disc or only do a disc in the front. Get together the product engineers, professional fitters, and frame builders and be prepared for a reality check about wider spacing. Do not become disillusioned by a pie in the sky obsolescence. Do not change just to hop on what you perceive to be the industry band wagon. Grow some balls, voice your opinion and think for yourself. Do what is best for the rider.
This idea as it is needs to die now. Kill it please!