Do they? I would like that to be so?
Yes.
Thats great! 
Has anybody got any real life ideas about how much NLOS service is actually possible using this system?
why do you think that OFDM will help you in NLOS situations? that is not true, the SR5 card will not perform well in NLOS situation. In fact, RouterOS does not support any NLOS equipment.
Well obviously I have been given bad info!
A supplier in my country was touting 5ghz ofdm products as being NLOS to a certain extent due to it having better modulation to defeat multipath reflection based interfierance caused by light obsticals!
I guess if you are right they are overselling their gear?
Well, NLOS (as in non-line of site) really means 2 different things. There’s a big difference between trying to shoot wireless through a forest vs. a NLOS link in a urban/city where you can take advantage of “bouncing” the signal around buildings (taking full advantage of OFDM). The latter works much better and we’ve seen some rather amazing links with CM9 cards at 5GHz. Every site and deployment is different, so your results can vary a lot. In general though, NLOS with respect to penetration doesn’t really work at all at 5GHz.
Thats more what I was expecting to hear?
I mean in reality we have had running for some time quite a few NLOS 2.4ghz customers operating without issues through light obsticals with the right antenna. I guess it’s all in the site survey?