Gonna run down my opinions on each developer that I remember seeing on the first page:
Nintendo EAD - I would say the weakest choice seen here I seen along with Naughty dog. They can be indeed overrated at times, but they really do deliver excellence.
Naughty Dog - Similar to above, but I will say they are bit more overrated for Uncharted Series, but that isn't their fault, that has more to do with the fans thinking anything Uncharted is amazing as undeniable fact. Uncharted 1 was meh, Uncharted 2 was amazing, and Uncharted 3 was a less than 2 but above 1.
Ubisoft (I assume Montreal) - For a developer to be overrated, one would think they would need to be highly rated. This year alone this star has faded to the likes of EA and Activision Studios.
Activision Call of Duty Studios - Again with the above, but I can understand reviewers in the distant past rating them above their actual worth, however now it is more on par with what it should be.
Quantic Dream - I do agree before Beyond they were over rated, but with the birth of Beyond Two Souls, this company has fallen from grace. It is more like they are over hyped and under achieve than over rated. Beyond Two Souls really is just laughable game. In fact a lot of lets players (huge market), just mocks the game while they play it.
Bungie - Similar to Quantic Dream, they have fallen from grace after Destiny. In fact I might say now the company is underrated because of how much hate Destiny gets alone.
Bethesda - I actually mostly agree with this one, and I love the thought of Fallout 4. Reason why, is simple Skyrim was GOTY. A broken game, that is insanely broken like Ubisoft games, should NEVER win GOTY.
Platinum Games, Teletale, Doublefine - Small niche following does indeed make all three seem over rated, but ...small niche following is exactly that... small and niche.