Episodes are getting shorter

So this season has been great, really a return to form, but episodes seem to be getting shorter. Episode 6 was just over 20 minutes, and last week's episode was a measly 18 1/2 minutes, which may be the shortest half-hour show I've ever seen. Last season had a couple that dipped into the upper 19 minutes, but this is kinda ridiculous.

I just hope they don't continue this trend since the writing is back on point.