To be sure, it's not an outright denial that there may be PlayBooks floating about with disappointing battery performance, but the immaturity of the software on them is clearly such as to invalidate any conclusions drawn. Perhaps more important than the imprecise discussion of battery longevity (what does "comparable" even mean in this context?) is the note that the company is still on track to complete its software optimizations and deliver its first tablet on schedule. Guess we can all quit worrying now."Any testing or observation of battery life to date by anyone outside of RIM would have been performed using pre-beta units that were built without power management implemented. RIM is on track with its schedule to optimize the BlackBerry PlayBook's battery life and looks forward to providing customers with a professional grade tablet that offers superior performance with comparable battery life."