New Plant Hardiness Zone Map for U.S.

Last week the USDA released a new climate zone map for the country, showing a general warming trend (no surprise there). Looking at the new map, the Fenway neighborhood of Boston (the location of plot Z1 the garden home of Grown Away) now sits squarely in Zone 6b, having moved up half a zone from 6a.
Overall this is not indicative of major changes for gardening around here. Plants that are only fairly hardy may have a better shot at survival, but overall I don't expect the growing season to start earlier or to end later, although this past fall I could have easily gardened into December, ah hindsight!!