There are a couple recent-ish case studies where super long landing pages outperformed short ones even for SAAS stuff: http://www.conversion-rate-experts.com/s

There are a couple recent-ish case studies where super long landing pages outperformed short ones even for SAAS stuff: http://www.conversion-rate-experts.com/seomoz-case-study/ http://www.conversion-rate-experts.com/seomoz-case-study/