I've heard nothing of that, and I drive it every workday (ungh). Do you have a link?
If anything, toll roads initially offered a discount for EZ-Pass and then took it away once people started widely using it.
I personally refuse to get one - I won't cater to any kind of tracking system.
(Wikipedia)
"Several agencies offer discounted tolls to E-ZPass customers. The details vary widely, and can include general discounts for all E-ZPass users, variable pricing discounts for off-peak hours, commuter plans with minimum usage levels, flat rate plans offering unlimited use for a period of time, carpool plans for high-occupancy vehicles, and resident plans for those living near particular toll facilities. Many of these plans are only available to customers whose tags are issued by the agency that owns the toll facility in question. (Reciprocity only applies to tag acceptance, not to discounts.) The three New England turnpike authorities (Maine, Massachusetts, and New Hampshire) restrict even their general discounts to their own respective tagholders."
Don't even get me started on the (OR) proposals to monitor road use and tax based on the gubernment's databases of zactly what you've been up to lately (or ever).