Seems like it, but GTA V's seems really pronounced for some reason. I don't know if they've ever gone like 8 months with literally nothing after a trailer.
The anticipation is probably getting a bit heavy. Anything they post on their website, YouTube, Twitter, etc. gets drowned out by comments and replies from people discussing and asking about more GTA V info. With these, they're able to not actually reveal anything new about the game, yet they'll maybe quiet down some of the fans. Kinda doubtful, though, to be honest. Like Kaizer said, all these are doing is making me more anxious to get some actual new details on the game and another trailer.