This for a lot of reasons, including the fact they've had quite headstart over the X1000.
Unless of course the Natami crew took out a million dollar loan with Atari and it's due to be repaid.
The original board was delivered in Sept. There was a problem and they change the memory and memory controller and that was finished in Dec, irc. So, once the board became functional again, then the individual component implementation and testing began.
So it's natural to see more progress since January. This is to be a 68K machine as is not in competition with the X1000. It's also not designed to be more of an emulation platform like the Replay/FPGArcade board. This board is design to be an A5000+. Evolutionary, not revolutionary.
As you have seen from the Replay board, faster memory access can make the system perform better and with DDR2 burst mode fully implemented as well as double the cache of previous 68K cpus before it, it will be quite responsive.
If you still think it's vapor, then by all means don't click the link posted above, lest you want your propaganda be quelled.