I'm really glad about the official word of season 5, but I actually hope that they just keep it at the 13 episodes mentioned and leave it there. It's been mentioned already that most of Chuck's big "dragons" have been slain already (why he got kicked out of school, why Jill dumped him, wanting to become a "real spy," the romance with Sarah, having to keep his friends and family out of the loop, facing off against an evil intersect, getting the full story behind his father and mother, and now he's cleaning up their mistakes that kicked the whole thing off). What other major plot arcs are left to uncover without having to stretch into incredibly cheesy or irrelevant territory? A shorter season that does the job of showing how things settle into place following all of this drama seems like it would be a nice way to tie up the series, as I have a hard time imagining that pulling it longer will really produce a well-paced and impactful plot.