Yes but it's a stall tactic so the manga can get further ahead.
Like Bleach, I heard the english subtitles has been cancelled as it was really close to the manga.
When it comes down to it, that is all filler is.
All filler are made up stories put in a anime so that the author of the manga can continue to create more of the story. Every manga induced anime does it at some point if the manga is still going on. Naruto, Bleach, One Piece, DBZ, every anime that is going on at the same time as the manga will have to do filler at some point.
Hell, there are few animes that don't wait for filler and make a new story, that is what happened with the first Fullmetal Alchemist anime and the Soul Eater anime. They didn't want to wait and make filler, so they made their own story instead of making filler in order to wait for the main story to be made...
As for Bleach. The manga has entered its final arc, and seeing how it is the end of the series, I think the company wants to wait until the manga is far enough to continue without coming to a point where they have to make more filler (it would suck for the final arc to be interrupted by a filler arc about halfway through).
In regards to DBZ filler, I think they had very interesting fillers in general. Sure they were random at times, but I'd rather have random filler then boring filler (and that Garlic Jr. Filler was actually fun seeing how it connected to the movie, something anime movies rarly do ever).