It's not a technical filibuster. They are refusing to vote for a quorum, IIRC. See comment# 68. Paez waited four years, if I read the link there correctly. It was a speed read.
Right. The article suggests it's the Republicans who are inviting the shutting down of Congress. In reality, it's the Democrats who are shutting down Congress in a roundabout way by obstructing every single Judicial appointee sent to the Senate for a "simple majority" vote. But, since the Democrats want to filibuster every appointee, it requires 60+ to override the filibuster. As I said, it is the Democrats who are stalling ("shutting down", if you will) Congress.