That, together with "no changing search to google" is going to make many people hate Windows S, I bet.
I highly doubt it. The majority of customers won't care at all. Edge and Bing are both really, really good. Most customers that I've worked with when during technical support don't really notice and usually just keep the defaults. Chrome's touchscreen support is absolutely awful so Edge is usually the best go-to option for a touch screen PC anyway.
The ui was so similar to google's, the results good enough and I got "fooled". I think I noticed because I wasn't finding links I knew the "google keywords" to. So their results somewhat do differ !
I switched back to google once I realised though.
I'm not sure if there are good statistics out there (especially one that proper controls) but I'd bet a good amount of money that most non-technical users either do not care or do not know what the differences are.
(Honestly there isn't much of a difference between Edge and Chrome, Bing and Google. At least from a non-techie user's point of view).