I asked about CPU speed, because as we already told Server Load is just virtual value, so for fast CPU same server load will mean something else than for slow CPU (fast one will do his jobs fast, so even if there are additional tasks waiting in queue those will be handled fast).
About your number of CPUs - at this moment I'm lost just like you. It is your server and I will not help you to determine do you have 1 or 3 CPUs. I can tell you that for servers it is better to have bigger amount of slower CPUs than smaller amount of faster. 2+2=5 it means that 2 processors with power 2 will do better job than 1 processor with power 4, because server have lot of small tasks, and having 1 processor you cannot do it parallel way.
Server Load will also have different meaning according to number of processors. If you really have 3 fast processors then server load 6 (total not per CPU) is OK even without additional checking. If you have 1 processor then you should additionally check real response time for our sewer. As you wrote you already did it and it is OK.

For time you see your server load is bigger and page slower (cached one - please remember that for not cached the real response time is not up to your server at all, but up to Google response time), please check is it because bigger traffic, or maybe it is because of some background tasks (like vBulletin cron jobs, or even your own operation system - like automatic update tasks or something like that).

According to your last response - if there is no real issue - do you need any future assistance in this topic right now?