Didn't see this posted here and haven't checked my thread in a while, but LEAN his been confirmed!!!!
The interview is below and here is a the quote confirming lean.
Josh Peckler: "Peek, lean and prone?"
PCDev: "I won't talk about balancing, but you will be able to lean".
Maybe the real reason for the lack of implementation, was they were too lazy or cheap to write the extra code.It seemed like that project was all about squeezing every penny out of the consumer.