From the release - Facebook "expects to start filing public financial reports no later than April 30, 2012."

TC interpretation - "Clearly, it looks like Facebook plans to IPO no later than April 2012."

My understanding (worth sharing, if I'm correct, as I think TC's surety in their statement is misleading) is that Facebook can report publicly for as long as they like without having to go through an IPO and list.

While they're unlikely to do so indefinitely, I don't think their statement means that "Clearly" they'll be doing an IPO in the next 15 months.