While I understand not voting for an individual who doesn't align with your views, "walking away" from one party to the other doesn't really make any sense to me. The partisan divide stands on a philosophy, not just the talking heads who are visibly waving the partisan flags. If I were to leave the democratic party (not that I am a registered democrat, but I do largely agree with the philosophy of the left on most issues), I would leave to a party that more closely reflects my views, not the republican party who I fundamentally agree with on so many issues, especially when an individual like Trump is leading the party, who is pretty much the antithesis to leftist views.
If people are truly walking away to the Republican party, I can only assume that they never really held onto the philosophy are are simply someone who just gets swept up with the talking heads. While that is all fine, I don't think it really serves as an educated opinion on the state of the republican/democratic parties.
I see little to no value in the stories of these individuals beyond a mildly interesting, yet anecdotal curio (and as such fairly meaningless statistically).
And of course there are issues whether or not any of this is actually legit in the first place...