2 questions:
1) would this work with mosh? 2) lzo/lz4 has lower latency then zip, is there an ssh patch supporting this and would it be noticable in a 2k4 scenario?
I don't think mosh-type scenarios are what HPN-SSH aims to improve. It is more targeted at high-bandwidth, high-latency scp transfers.
(say, 300Mb+ connections with 30ms+ latency)
mosh uses a completely different protocol (over UDP), and I think the aim of these patches is to improve throughput, not latency, of SSH. In a high performance situation you probably have high bandwidth, and then it's better to disable any compression. Compression only makes sense when you have limited bandwidth and sufficient CPU power.