It is completely opposite to my experience, Exact Audio Copy with Secure (not Paranoid) mode, with enabled "defeat audio cache" feature grabs modern new CD on proven SATA LiteOn drive slightly faster than realtime, and slim USB attached drive could spent 3-4x time (0.25x) and fail at the end!

And, yes, old Audio CD (new old stock, 10-15 years old) can be grabbed at 6-8x speed. Looks like new Audio CD pressed much worse than old ones.

I don't believe in 48x exact extraction, sorry.