Time for Investors to Get Serious?

I try not to beat the Case-Shiller Value Index to a pulp when reporting each month but there's another measure I track that is showing an interesting trend.  One of the indices reflects value in tiered pricing, that is high-priced, medium-priced and low-priced homes.  The value trends for each of the three tiers is represented above with the left axis showing the percent decline from peak values in 2006.  Throughout the correction, lower priced homes have declined faster and been slower to recover but now we see all three tiers beginning what appears to be an upward trend.  Could this be a trigger for investors (especially those looking for 'bargains') to realize that the time to act is now?