You are absolutely correct; I should have actually done the 5-second calculation before writing that instead of relying on my flawed memory.
Looks like the publicly available rainbow tables go out to 7 characters with special chars included, which comes out to a much more reasonable 3.2 TB (using 62 chars).
Looks like the publicly available rainbow tables go out to 7 characters with special chars included, which comes out to a much more reasonable 3.2 TB (using 62 chars).