Shuster was born and spent his first years in Toronto until his family moved to Cleveland when he was 10. He was a paperboy for the Toronto Star (would that become The Daily Planet? )

So perhaps Metropolis is his imaginary blend of his childhood home and his adolescent home?

c.
eidt: just checked Wikipedia ( blush ) and it cites an interview Shuster gave in the year before he died, in which he indicated that Metropolis was based on Toronto. Also found out that at first Clark Kent worked for "The Daily Star" but that DC later changed the paper's name to the Daily Planet. ( never knew that but I bet Ann and Tank, comic book fans extraordinaire, both knew that latter bit smile )