Depending on the size of the inline picture (not just with Google) it could be larger. I've definitely seen some shorter native formats in the wild.
The accidental click comes in since you can't just scroll past this with one swipe. I haven't tested this particular one, but every single other flying carpet I've seen restricts flicking motions to get past it in one fell swoop. They require multiple clicks to inch it up the screen, and that requirement alone increases the risk for accidental clicks by the mere fact that it requires more touches on the ad to get past it (despite said touches being paired with a swipe motion).
I really hope this new format is aggressive against accidental clicks, but on older devices where those actions might take longer to process (ie. my beautiful old Nexus 4), or where people are clumsy, or don't have strong screen contact (gloves), I could see it registering as accidental clicks.
Per my other response in this thread, I would hope there is logic around things like waiting to see if a swipe motion immediately follows the touch, looking at how close the touch is to the perimeter of the unit, etc. But I just don't know at this point so I'm going to err on the side of more accidental clicks based on past experiences with this format on other networks/publishers.