I have been doing A LOT of ban testing since the sledge hammer hit around Halloween.
Jagex's detection and banning system is INCREDIBLY simple.. Here is how it works mathematically, Like so
s = \sqrt{\frac{1}{N-1} \sum_{i=1}^N (x_i - \overline{x})^2}
So if you break down the sum and overline, the equal boils down to one thing..
If you bot, You get banned.