This is true, however I have had to replace many EZRJ45 connectors I have encountered installed by other contractors as well as those I installed years ago myself that were over 4 - 7 years old, its not that they fail right away but they do fail at some point and with much greater frequency than standard connectors. The exposed end of an EZ is right next to the contact spears.

On a standard connector there is a much greater distance between the spears and the enviroment and if they are assembled correctly the jacket will be nice and snug within the connector further insulating the whole thing.  I my self many years ago argued in favor of EZ's simply because they were less time consuming to install especially for the new guys working for me at the time. But I had to eat crow, the time savings is not worth the increased failure rate down the road