Other FPGA Comments
Performance is usually several factors to an order of magnitude lower than standard cell. Performance depends heavily on quality of FPGA technology.
Design time advantages are the same as for standard cell (use same type of cell/macro library).
Densities are an order of magnitude lower than standard cell but an order of magnitude higher than normal PLDs.
Very good for prototype design becasue many FPGAs are re-usable. Can be used to prototype and verify designs before investing in technologies with high start-up costs (e.g. full custom).