You've undoubtedly heard about the Cubs' 22-6 start in comparison with other Cubs teams from history and that it's the best start since 1907. Here's another comparison from recent major-league history:
I thought I'd take a somewhat different look back, checking out where all the Cubs postseason teams in the divisional-play era were after 28 games. I also looked at where three of the best teams of this era were after that many games, the 2001 Mariners (who wound up with 116 wins), the 1998 Yankees (114 wins) and the 1984 Tigers (104 wins).
As you can see, Cubs postseason teams before this year were all off to at least decent starts through 28 games, some a bit better than others. In 2007, they had a positive run differential despite being at .500, and wound up losing 17 of their next 25 games before going on a great second-half run.
This year's Cubs compare favorably to the three other clubs I've listed in this table, even to the 1984 Tigers, who got off to a fantastic 35-5 start. The Cubs' current run differential of +98 is even better than Detroit's was that year after 28 games.
I'm going to run this feature on an occasional basis during this season, because this year's Cubs are doing amazing things, and I think we should keep track of how they shape up historically.