So, are these the new numbers? I copied the numbers from the original and the new post:

  haproxy direct: 6,000 requests per second
  stunnel -> haproxy: 430 requests per second
  (OLD) nginx (ssl) -> haproxy: 90 requests per second
  nginx (AES256-SHA) -> haproxy: 1300 requests per second
  nginx (AES256-SHA with keepalive 5 5;) -> haproxy: 4300 requests per second

Did other things change or is nginx more than twice as fast as the next best solution?