SHA-256, Scrypt have already been raped by ASIC & FPGA.
"difficulty_sha256d" : 7.16871583,
"difficulty_scrypt" : 0.03775192,
"difficulty_groestl" : 0.83975090,
No not really considering the difficulties are wicked low. Make use of your low power mining devices now! I am using outdated asics to mine and getting blocks even with 70kh/. This will not last when real hashpower comes onboard.