Yes, LEDs do slowly degrade, especially if they run hot. They need fans to keep them at a reasonable temperature, which in the environment of an engine bay is a crap idea in my opinion. In all probability they will quickly get clogged up with dust and dirt and the LEDs will overheat and fail.
As to motoring journalists, they are great at telling you fatheaded things like the controls all being at hand, or that their is an air of well-bred luxury or how long it takes to get to 60 for some reason. (I've been at 60 many times; it's nothing special and I'm in no particular hurry to get there again at speed)
What most motorists want to know is how long the tyres last, and how much they are, an honest mileage figure, how easy bulbs are to change, and how much a remote key fob is going to rush you if you lose one etc. These often come up with embarrassingly high charges so are omitted in case it offends the manufacturers who will refuse them the cars and jollies they love so much. None of these petrol heads are worth reading in my estimation.