I just checked out the walk score website.....it's a bit questionable
I tried to figure out how Halifax got a better score than us considering the HRM is sprawled beyond belief. It would appear that when taking the city area in to account, the website only considers Halifax peninsula and Dartmouth, whereas St. John's encompasses all of St. John's unused land (city boundaries), plus a portion of Bay Roberts that I'll never understand.
EDIT: never mind, I figured it out! When zooming into a city it'll also show the rating of the surrounding city. Though that's still a lot of land bringing our overall walkability down