No it didn't. It's immaterial.
It's not whether she did it after some fight that matters. It's whether she did it.
I mentioned on another thread that I asked myself what could have been done differently to convince the jury?
The only answer I could come up with is a better, ongoing narrative. Getting in accounts of the family blowup on the 15th might have filled in some of the holes.
I personally think the family issues goes to motive much more than Casey wanting to party. My opinion is that all that has simmered in the Anthony family (especially between Cindy and Casey) came to a head that night and all hell broke loose.
Cindy considered herself to be “co-mama” at the very least and she knew (by her myspace post) why Caylee was gone. Jealousy.
The investigators could not crack the nuts. They tried. The prosecution could not get it in. They only had what they had.
A better flowing narrative in the same vein as the closing statement just might have helped the jurors make the connections which seem so obvious to us.