Yes, that's possible, or maybe it was surprise that he survived the chest stab and all the other stabs for as long as he did. He survived so long that she had to shoot him to make sure he was dead.
No, she didn't say that to police. She did say to 48 hours that the gun didn't go off when they tried to kill her.
I think that is totally missing the boat on this one. She said that because she knows he was stabbed continuously instead, and wanted to draw suspicion away from herself. That's probably one reason why she chose to stab him, because she thought people would doubt that she would be capable of it. And unfortunately, she was right, some people are falling for it.
You mean she ran out of the room to get a knife? Remember, she only has 62 seconds till the body dragging photo. The time constraint makes this search for a knife unlikely. She would have had to have it in the room already. But why have a knife if you are intending to shoot the person? It's not as curious as why she would have a gun if she intended to stab him, since the gun could be for backup. She wouldn't need backup for the gun.
This would fit, but it goes with either theory.
But I don't buy this. She didn't care about being humane in the least. Otherwise she wouldn't have the knife in the first place. She had a knife because she wanted to make him suffer. She wanted to see his face as she's killing him. If you watch Dr. Horn's testimony describing the autopsy photos, you can see Jodi sitting there most of the time fake crying with here head turned away from the monitor, but occasionally you can see Jodi turn her head to take a peek. One time she noticeably turned to look was when they were showing the neck slice pictures, probably the most disturbing photos of all of them. She wanted to see her handiwork because she enjoyed it.
Go to 1:35:55 here.
Jodi Arias Trial Day 3 (Full) - YouTube
I agree it's possible to survive (if you get medical treatment), but unimpaired functioning is not as likely. Possible but not likely.
The DT hasn't produced any experts at all yet, but they did question him on it. Wilmont brought up that we've all heard of people showing up walking into the er with brain injuries, like from an arrow. Horn said not so with firearms. Bullets do much more damage because of higher speed and movement and the "expansile cavity" the bullet creates. I think he is overstating because he is coming off as saying that nobody survives a gunshot to the head, but it does happen.
Wilmont also tried to argue that Horn can't know whether the bullet even went through the brain because of the decomp, but Horn was of course firm of that, because of where the bullet entered the skull.
Where you see her "I think I would have to shoot him continuously until he was dead" as an element of truth, I see it as an obvious diversion away from her culpability, just as we can see she has attempted in many other instances. You got at least one fact wrong about the interrogations, so maybe you need to watch again.
I agree she didn't want blood outside the shower, but I think she was planning on her attack being confined to the shower area to make cleanup easier. The shower served two purposes, to get him off guard and to make cleanup easier. It succeed in the former, but only partially for the latter. She dragged him back there, precisely because she was trying to stick to that plan.
I would agree it's possible she shot first, but I don't think it's as likely as the other way.