Yeah I know... I don't know why.
Once I remembered that Lou P couldn't lead his great Mariners teams to the WS I realized that the Cubbies were doomed.
I think maybe because the Cubs played so consistent throughout the season, combined with some solid signings/player developments (Harden, Fukodome, Soto) and both Sox recently breaking their 'curses' fans thought that it was time.
Plus this was the '100 year anniversary', so I think some people liked that rounded out number.
I wasn't surprised or shocked, just reminded.