I don't believe that there's any real difference between breaking in a hybrid compared to a non-hybrid.
I think it's more learning how to drive it differently to take advantage of the hybrid functionality.
The longer I drive mine, the more I understand how to drive it for mileage.
Everyone's commute is different and you need to learn how to drive your commute.
e.g. On my old commute, I could get anywhere between 50 - 73 mpg for a trip average after I'd converted my NAH to PHEV, which was 20 miles each way under 40 mph
. Now on my mostly freeway only commute I get anywhere between 42 -47 mpg. Some of this is dependent on what the commute traffic does, but a large part of it is how I drive it. There is a sweet spot at about 62 mph
that gives the best mileage. You can't rely on cruize control to do this as it maintains a higher throttle usage than I do to maintain the same speed.
My best tank is 46.5 mpg and 1033 miles on a single tank of gas after conversion, before conversion was 880 miles and 39 mpg.