I commute from NJ to downtown Manhattan via GWB few times a week, unfortunately some cyclist have attitude.
This people forgot how nasty is an accident such us bike against a bike or bike against a human being, technically you are few inches from the metal fence from either side. Even the best Styrofoam won't do much to protect you.
Once the NY people is on the bridge they speed up to get to 9W and same goes to NJ people, when they are getting back from NY to back home.