... What?
I don't really know what issue you're trying to get across but you could always just alter world.tick_lag to suite your needs.
He is talking about how having an even number tick_lag will make syncing graphics and ticks easier. For example, if your fps is set to, 38... your tick_lag will be 0.26315789473684210526315789473684 which I believe is rounded down to the nearest millisecond... so that becomes 0.26. Anyways, what happens here is that things like sleeping for 3 seconds has no "even" relation to your frame's per second. In that time period, you'd have 115.38461538461538461538461538462 server ticks...
If you use an FPS of 40 you get 0.25. And 3 seconds becomes 120 ticks. This makes a lot more sense with all sorts of things, specially with moving pixels around on a screen.
I don't really know what issue you're trying to get across but you could always just alter world.tick_lag to suite your needs.