Nope, for the record, the the post above was posted before I saw your reply. =)
I do have to say I should've read the complete thread more fully as mistwang did have mention about the pros and cons of poll vs epoll and how it applied in concurrency rates. So you are right in that he was hinting that poll could be faster than epoll depending on concurrency rate.
Though I would still liked it having epoll enabled simply because it would put everyone on the same event dispatcher, even if it's at LiteSpeed's disadvantage, as it would be to no-one's advantage at using the same event api, when the product supports it.
Now I know who to contact for hssTVS setup, you will definitely hear from us when it comes to the next round of benchmarking.
As for conditional GETs and HEAD, I would say conditional GETs are much more important than HEAD and it would be a good benchmark metric.