Honestly, there were so many police officers mixed into the crowd to prevent any outbreak of violence that it seemed like a tenth of the crowd were policemen who didn't look happy at having to be there. There were also many people like myself, covering the event but emphatically not a part of it.
Then too, there were the passers-by. The protesters jammed themselves against one of the gates to Capitol Square and apparently counted everyone who came through that gate as members of their group, even though most were not. Notable among these were a group of pro-gun control protesters wearing Virginia Tech colors and shirts and signs calling for the closing of the gun show loophole--but they came through the gate, so they were no doubt counted as 10th Amendment protesters.
Now, to give the devil his due, the 10th Amendment people were by far the largest group of protesters (really, they were 19 groups cooperating with each other to make a bigger splash), but the simple fact is that there were nowhere near 1,000 people--let alone 2,000--in that group.
A final factor to consider was the overall makeup of the crowd. Let's just say that the average Virginian would not want to be represented by this crowd of militia men, neo-confederates, and wackos of various stripes. They did not make a good impression or win converts.