Whilst this article and research was written in the USA, we see a lot of the issues and thinking reflected here in the UK.
If you are a channel exec, it's worth 10 minutes of your time to have a quick read.
“Some companies look at partnerships as a numbers game. They add as many as they can. But only a handful of partners will really drive added value.
http://www.destinationcrm.com/Articles/ReadArticle.asp