Dzogchen analyses in this thread which Prosper groups have grown fast and larger. He uses own categories like 'distressed borrowers' to analyse group performance and found out that groups directed at some causes have experienced much higher defaults then others. E.g. in 'distressed borrowers' 12.1% are delinquent, while in 'entrepreneurs' it's 6.2% compared to 0.5 in 'computer users. techies'.
Following discussion included whether this allows predictions and if listings without groups are better risks. An asked for report was if borrowers that posted in the 'Review My Listing' did have a higher rate of defaults.