It's only disappointing that the most common standard nowadays is 1GB/s. I feel like there is a big gap and standards like 2.5GB/s or 5GB/s were somehow ignored and 10GB/s is a big jump up (also price wise)
"b" = bit
The ubiquitous 1000BASE-T form of Ethernet transmits 1 gigabit per second (1 Gb/s).