I don't think they are manufactured results in the sense that the votes are fake, I do think we are increasingly reaching a point where data analytics on elections allow both parties to manufacture carefully constructed platforms and campaign advertising to hit their target audiences and further results towards a near 50/50 split.

Each election gives more data and each time it happens they'll learn a bit better how to target voters and last minute results for their side. Elections are essentially becoming a kind of business and I think you'll just see more and more decided by razor thin margins and no clear mandates as the parties adopt whatever positions they think will help grab them the sliver of uncast votes needed in a winner takes all system.

You could say the elections are manufactured because a lot of the discourse isn't really organic. It starts at the grassroots level but it quickly gets sanitized and packaged for partisan consumption once the political machines get to it.