How much actual filibustering has been happening?
There hasn’t been any until Scott Brown got elected. They have rammed almost everything through.
None. THere have been a lot of cloture votes, because Harry Reid never works with the republicans, he often schedules cloture votes before he has even published the legislation.
But no legislation has been blocked yet by a filibuster. A few nomination votes have been held up by failed cloture votes, and Reid has refused to file for cloture on dozens of other nominees, fearing a floor debate.
Also, the types of bills being presented this past year were HUGE expansions of government, not your typical measured bills. Dozens of such bills have made it through without cloture, just as many judicial nominations have been voted on without a filibuster.