They found the other 44 machines!
The scores up through the 9.555 teraflop one were done with only 2,112 CPU's. The newest one has the full 2,200 CPU's online.<p>
No, that doesn't account for all of the increase - adding those 44 machines would've gotten them up to around 9.9something teraflops, not 10.28.<p>
IF they're using the standard math libraries in 10.2.7...<p>
AND IF they're doing stuff that makes heavy use of AltiVec and vecLib...<p>
...THEN upgrading to Panther would send the scores through the roof. On my G5, XBench reports 2.6 gigaflops for "AltiVec Basic" and 2.18 gigaflops for "vecLib FFT" under 10.2.8, and 3.99 gigaflops/3.44 gigaflops respectively under 10.3. That's gains of 53% and 57% on those parts of the benchmark.<p>