So someone in Forbes has a piece about a survey Frum conducted of the teabaggers at that March 16th protest. There’s a link to the whole survey in there, and a lot of detail, but here’s the takeaway:

The Misinformed Tea Party Movement:For an antitax group, they don’t know much about taxes

In short, no matter how one slices the data, the Tea Party crowd appears to believe that federal taxes are very considerably higher than they actually are, whether referring to total taxes as a share of GDP or in terms of the taxes paid by a typical family.

Tea Partyers also seem to have a very distorted view of the direction of federal taxes. They were asked whether they are higher, lower or the same as when Barack Obama was inaugurated last year. More than two-thirds thought that taxes are higher today, and only 4% thought they were lower; the rest said they are the same.

As noted earlier, federal taxes are very considerably lower by every measure since Obama became president.