I just installed a new SRAM Black Box GXP bottom bracket with ceramic bearings on my Tarmac today. SRAM Force cranks, current generation. Since the frame is 68mm shell, I used the two spacers that are included in the box (you aren't supposed to use the spacers if the frame shell is 73mm). When I start to snug down the 8mm left crank arm bolt, there is a TON of drag in the system. Then as soon as the bolt is just snug enough that there is no play in the cranks, the system is so stiff that the arms don't spin at all. Literally not at all -- they don't move without significant force applied.
Now I admit that I do not have a torque wrench with me since I am traveling. No one has the proverbial "torque wrench wrist." But I can say that I have installed enough bottom brackets with torque wrenches that I am not coming close to the torque spec when this binding is occurring. This is happening early--the bolt is very barely snug.
I checked the seals and everything is in its proper place. I double checked the spacer orientation and they appear to be double-sided. I applied plenty of clean, high-quality grease.
I have heard that new ceramic bottom brackets take a bit of 'break-in' to limber them up but this seems even more stiff than just a break in period.