From my understanding of the NGS buyout (which preceded the great NGS exodus) it was on different terms to the SecureTest buyout.
Also SecureTest and NGS were very different creatures. The phrase 'herding cats' was never so much an understatement as it was from what I've been told about life at NGS.
It's also a bit more difficult to bring that level of control into a company outside of the UK. I'm sure there'll be an eventual absorption into the NCC cube (more likely co-absorption of iSEC and Matasano into one entity if previous activities are considered) but I imagine there'll be a fair level of autonomy as long as the founders stick around.
Also I still chuckle about the SAP implementation. We offered to test it years back but for some reason NCC weren't up for it.