My experience exactly. Pears dont fruit faster on dwarfs necessarily because they are dwarfs. My experience is they fruit faster because of hormones. A quince makes pears fruit faster because i think these hormones are triggered because of incompatabilty. Harbin pears like many grow in zone 4 are slower to fruit sometimes. Some zone 4 pears can be seen here Golden Spice Pears - #12 by clarkinks
Here is my answer concerning making pears fruits faster
@mayhaw9999 is another avid pear grower who can offer tips as well. We have all grown pears for decades and after that many years we know every trick in the book to grow pears. People like @Fusion_power has decided he too wants to begin growing lots of pears and has started to plant hundreds of varities like we have grown. With all this combined knowledge on this website we have done most things from girdling to interstems to rootstocks etc. To get faster fruit. We will gladly help you with anything we can.