People keep saying Bisping gets clipped every fight and whilst that may be true how many times have we seen him get clipped then finished on the ground? Never is the answer.
I'm not saying its not going to happen but those backing Vitor seem to think its a stonewall certainty.
There's a difference. None of those fighters actually attempted to follow up on their opportunities, minus Wand who scored them with too little time left in the round to finish. Vitor is known for clipping, swarming, and finishing... he does it almost every fight. That's why people can see the same happening here.
As you said, just because it hasn't been done doesn't mean it won't be. Nothing is certain in a fight of course, but the odds of Vitor finding Bisping's chin and finishing the fight are hardly unlikely.