I've put on about 200 miles since moving to Boston, and that observation does not align with my experience at all.

So far I've ridden one very good path connecting a few suburbs to Boston (Minuteman Bike Trail, a rails to trails path). There are other paths, but they're combined with running/walking trails and generally not conducive to bicycle travel.

The bike lanes of nearby Somerville and Cambridge are okay, but still lacking in comparison with Minneapolis.