Sometimes reception can be funny. I lived in Elk Grove Village, IL on the second floor with an outdoor antenna on the roof and I could pull in Channels 13 and 8 from Grand Rapids Michigan with ease. I have no idea why those stations came in 99% of the time. And very clear to boot. I couldn't DX any other stations, but for some reason at that particular spot, 8 and 13 came in clear as a any Chicago station
I'm surprised about that reception report on Grand Rapids/Muskegon's channel 13 in Elk Grove Village, but were there also times that another but closer Channel 13 (WREX Rockford) made an appearance at your former EGV home?
No, I never received any DX's at that location other than Channels 8 and 13. The thing that surprised me is they were there 99% of the time. It wasn't like a typical DX where you get it and it fades out and in.
When I lived in the South Suburbs of Chicago, Rockford was always a hard catch. I could catch WTHR Indianapolis, on a summer's night, in fact I got more DX from the Southeast than any place else.
The South Suburbs when I was a kid were a great place to DX TV. I didn't even have an outdoor antenna just what was on the B&W portable and in summer. I can't remember getting anything from Rockford or NW. I did manage to pull in Corpus Christi once and I even got Channel 4 from St John's Newfoundland
I can't speak of digital but with analog I think it really not only depends on your general location but your specific area in the location as well.
I remember when I set up my Colecovision incorrectly my next-door neighbor complained that she could watch me playing it on her TV. Don't know how I did that? LOL