The fourth season premiere of Dexter on Showtime hit a series high 1.5 million viewers in its first airing, and up 25% from the season three premiere. It was the most watched show on Showtime since at least 2004 (apparently the way Showtime counted shows changed then). Californication hit a series high of 821,000. That up 57% from last year's premiere, according to The Live Feed and:
If you fold in the show's same-night encores, "Dexter" was seen by 1.9 million viewers and "Californication" had 1.2 million.
Though I'm happy for the shows, I started to watch Dexter and was about half way through it, got distracted by something and never went back to it. I'll probably wait until there are a few episodes and binge on it, unless I get distracted again. I haven't checked out Californication yet either, but those are so short I like to queue them up and watch a few back-to-back.