I think the REIV like to play with their numbers a little. We were discussing this over at GHPC, as Foundation pointed out, they like to overstate the upside, then correct their numbers the following qtr with a decline:
In Feb they announced a 12.8% rise in the Dec 2007 qtr to $485k. But today they announce a 8.4% drop in the March qtr from $472,250. Either the rise was smaller, or the drop bigger. The trend is pretty clear, one qtr is great, the next is a decline. Either way average these numbers out and we may be somewhere around reality.
As GoAnna says, watch your areas and make up your own stats, they will probably be more accurate.