It's gotten far better. As a grad student who races for MIT and trains on the roads around Boston's suburbs, I've found most drivers to be surprisingly patient with us cyclists. There's the fair fraction of drivers who turn without signaling, but the only anger I've gotten from drivers is when I've run a red light (deserved it). The suburbs to the west are packed with road cyclists, and good weather weekends mean the roads are full of cyclists. The protected bike lanes have helped road commuters, and prevent angry interactions. The stereotype of Boston drivers being extraordinarily unfriendly to cyclists is outdated by now.