The number of U.S. households with more than $25 million in net worth, not including the primary residence, increased to 107,000. But that number also remains well below pre-recession levels. The lagging real estate market continues to impact the overall net worth of those in this segment.

According to the report, affluent investors remain worried about their financial future, with 83% saying that attaining the American dream will be difficult for future generations. Confidence levels continue to rebound, but remain below pre-economic-crisis levels with wealthier investors more open to taking investment risk.

Another report finding: Social media is being adopted by investors at all levels of wealth, regardless of their age.

Spectrem's Affluent Market Insights 2012 report also provides findings from ongoing research into investors at all levels of wealth on a number of strategic issues including: the market size of each level of wealth; how investors are using social media; their 2012 investment plans; and how their risk preference has shifted since 2009.

 --Jim McConville