Overclockers Online has posted a new review on the GELID Solutions GC-1 Thermal Compound

Arctic Silver 5 has long been hailed as the king of thermal compounds but it seems the king is finally dead. The GELID GC-1 trumps the AS5 in a couple of aspects. Letting the temperatures speak for themselves, the GC-1 does a much better job at conducting heat (or maybe, not impeding it as much). There is a caveat here, however, as the "delta" temperatures were somewhat close. With that said, the GC-1 did have a smaller "delta" between the idle and load temperatures in every test.

GELID Solutions GC-1 Thermal Compound Review