I'm not a fan of the board, I have a Coridium and it makes a great paper weight, when the fan is off.
Not a fan without even looking at the documentation?
Supposed to work in basic too I suspect the basic is the same.
Actually, it isn't the same. CoreBASIC is far more advanced than the Coridium stuff. It supports complex numbers, quaternions, matrices, and so on.
Interestingly there is a "Free" C compiler but if you set it up you can't go back to basic... So we have another interpreted Basic like the Stamp...
No, quite unlike the Stamp, in fact.
That needs a 64 (I think) MHz core to operate...
That would be 80 MHz. The BASIC interpreter is fast, but is distributed with native-code pre-written drivers for a whole range of sensors, busses, shields, and it even has networking built in and program download and firmware upgrade over the Internet. And you can debug a CoreBASIC program across the world using an internet connection. So, I think you're not open minded and are coloured by your exposure to existing products.
maybe at 2/3rds of the Arduino's speed.
Or maybe not. You're just supposing. CoreBASIC can compute things a lot faster than an Arduino in many cases. Just saying.