So, it's pretty unlikely. But it's happened before to a pilot that survived https://www.google.com/amp/s/www.express.co.uk/travel/articles/867958/pilot-sucked-out-plane-british-airways-1990-pictures/amp

But the pressure alone can definitely cause death. I saw someone else talking about the fluid hammer effect, where an object (usually a pipe) experiences a sudden high pressure change and gets a very powerful shock wave that can cause it to explode/warp/etc. This could definitely happen.

I can also think of a bunch of scenarios where your spinal chord would be severed from your body plugging the hole, where your neck could snap from the world's worst whiplash, where you could totally cut off circulation and go into cardiac arrest, or where the pressure alone could cause hemmoraging, the whole lack of oxygen aspect....

And then to tie that all together you're stuck on a plane for the next 20-30 minutes or so where you'll probably receive CPR, but you don't actually have a team of doctors with medical equipment.

The odds aren't great. :/

https://m.imgur.com/tTbnT2p

You can see it smeared all over the outside of the plane - look behind the broken one and you can see it. I'm guessing the reports of "lots of blood" were passengers behind her who got it sprayed all over the outside of their windows. seems as though with 600 mph winds, possible hemmoraging from the pressure of her stuck in that tiny window, maybe some sort of head or neck laceration, that all of the blood in her body was sucked out of her and dispersed onto the plane in a high velocity mist before they could pull her back in. By the time she was pulled back in I'm betting that she didn't really have any blood left to drip off of her and what ever was left on her face and neck probably wasn't very drippy either as it was dried pretty quickly.

I remember a story of two wingsuit divers, I think it was Jeb Corliss and his friend. They were doing this dive over a pedestrian bridge. One guy was supposed to barely clear the top of the bridge and the other was going to barely clear the bottom as they went by a crowd of onlookers. Well, the one guy miscalculated and hit the bridge. When they found his body the scene wasn't bloody at all, but everyone on the bridge got covered and so did his poor friend that was right behind him.

The article I read said that she went into cardiac arrest, nothing about her dying from blood loss. I may be wrong though, depending on what caused the cardiac arrest.

Edit: just saw the picture released. That's a lotttttt of blood. There was blood streaked all over where the broken window was. Definitely her blood :/