On XP - perhaps, but on Windows 7 and up FastCopy and TeraCopy are both slower than or marginally comparable to robocopy, which is a built-in bulk copying tool. Microsoft did an amazing job with it in W7, robocopy is really damn fast.
It's hard to find benchmarks, but things seem to point in the direction of fastcopy still being faster.
See e.g. http://www.sepago.de/e/helge/2011/05/17/fastcopy-free-file-c... (robocopy comparison at the end)
Would be great to see benchmarks of course! :)
fastcopy - 152 sec (average of 3 fastest runs out of 4)
robocopy - 65 sec