S25FL256S flash is not faster in Quad mode?

I have a custom board with S25FL256S external flash

I try to read in quad mode, it works but the read speed is the same as when I use commands 0x13 (4READ) or 0x0C (4FAST_READ ) or 0x6C (4QOR ) or 0xEC (4QIOR), all give the same read speed.

I measure the time to read one sector of 64KB, and quad mode reading doesn’t seem to speed reading time.

In quad mode, I set configuration register to 0x02 (quad mode enabled).

The data that I read is correct (because the total sum of the data and that’s what I get after reading).

I was hoping quad read commands 4QOR and 4QIOR would be close to 4 times faster

thanks