From User talk:Mathbot/Feedback on the summary bot:
 I do put a summary in if I think of it, it's not something that's automatic to me.  I think most times if the changes were important to me I'd be more inclined to add a summary, if it was just minor corrections on things such as style, grammar, etc I didn't put anything in.  

 Forgive me for pointing this out to a long-time, respected Wikipedian, but edit summaries aren't for the contributing editor, they're for the folks reviewing edit histories, to help them skim over what happened when without laborious paging through each edit. It's far from perfect, but it can be a real time- and server-saver. (With all the maintenance work I do on Wikiquote, and to a lesser extent on WP, the lack of edit summaries has become a bête noire for me, so I'm happy to see Mathbot tackling this.) ~  (talk)