No, all humvees are now "uparmored" and can withstand alot of damage.
The ones who were "thinned skinned" were never meant to act as a combat vehicle. They were originally invented for patrols and supply and escorts and stuff. But, with the new type of fluid combat, they couldnt just rely on dedicated, squad based APCs, this way each fireteam can have its own armored vehicle with a heavy weapon mounted on it.
