Hi Troy,
The highest theoretical data rate should be 11 Mbps, but when using TCP and HTTP protocols, there is going to be a lot of overhead. The highest data rate measured so far with an MSP430 (the MSP430FR5739) was about 4 Mbps. So when using MSP430 with HTTP, a much lower rate can be expected.
However... if you are willing to put in the effort, im sure there are a number of ways you can optimize the software to your specific application to speed up your rates.
Regards,
Aaron