We queried our head office reagrding this throughput figure of 62Mbps on our 7800N and they had looked into it and done some more testings. The result was very positive with a throughput of 90+Mbps ( average or maximum still 90Mbps+). We then verified the results again in our lab in the UK using faster PCs as we thought the previous result might have been effected by the PCs performance. Our engineers even sent over a backup of their config file so we can replicate the set as close as possible. Firmware tested was using 1.06f.dm3 (same firmware we released for Sky 1483MER).
So below are the OFFICIAL test result following Billions head office setup.
1) ixchariot 1 pair

2) ixchariot 4 pairs

3) iPerf 4 streams