We all know what happened with CES. If Warner hadn't made their move then, we'd have seen TL51s.
TL 51GB HD DVD has never been confirmed by anyone outside the precious HD DVD insiders. If it worked and was ready for replication, you can bet that Toshiba would have it ready to publically demo by now to make it credible and remove it from myth-status.
HD DVD enthusiasts claimed that BD50 was vaporware even when 50GB discs were being tested and authored throughout the industry at large. Yet when not a single shred of evidence exists to support the production reality of TL 51GB replication, it's touted by the same people as reality.