1. the timings in the #spd table (table that tells the pc how to set the ram) do not always match the advertised timings.
2.you should be able to manually set it to the advertised timings and if it doesn't run stably send it back.
3.normally you have to loosen the CAS latency or boost the memory voltage slightly to overclock. also the overclockability of a given set of ram can not be guaranteed
4. should be overclockable (although i would take OCZ over Corsair any day)
5. i don't think so, look up some marks for people with similar rigs. if you haven't seen any you can't say the mark seems low
6. this seems to be a reasonably common problem, not unique to your motherboard. i have not seen a fix for this problem yet
. it is possible though i highly doubt that this has something to do with power.
7. i am not sure, normally has something to do with background processes like spyware. sometimes is a hardware/driver issue