'Sort of' - the higher the baudrate the faster you can transfer the data.
You hardly need a reference, the calculation is trivial!.
9600 baud is 9600 bits per second, each byte takes a minimum of ten bits - so that's a maximum of 960 bytes per second. Assuming you're taking 10 bit samples, you need two bytes to transfer it, which takes your maximum transfer rate to only 480 10 bit samples per second (unless you packet your samples).
Sampling time isn't a consideration, as you can sample while you're sending the previous data.