I'm fairly certain that the typical improvement in data transfer rate from going to 1000Mbps w JUMBO frames from 100Mbps network is about ~6MB/s. ~14MB-16MB/s to ~22MB/s max. I get around ~4-6MB/s over draft n wifi.

Let's review those numbers, shall we?

You seem to be claiming ~14MB/s-16MB/s on 100mbps, improving to 22MB/s max on gigabit with jumbo frame - for an improvement of ~ 6MB/s. Did I get that right?

Well - for the record, the max theoretical throughput achieveable on 100mbps will be 12.5MB/s, in practice it's likely to be less - so your numbers are off somewhat, correcting for that we get closer to 9.5MB/s improvement and I have achieved in excess of 30MB/s on gigabit with jumbo, so we could be looking at an improvement of as much as 17.5MB/s - or roughly 150%.

Using the numbers I've observed, throughput on 100mbps has been somewhat less than the theoretical maximum, closer to 10MB/s and on gigabit without jumbo, roughly 20~21MB/s hence my earlier suggestion that 100% improvement was possible.