Yes. All posts were referring to an OS of Linux. It has been mentioned in other posts that Windows doesn't utilize burstable RAM for their VPS's.

In theory VPS's should isolate all users so that one will not affect the others in any way. Nothing is perfect though, so it's possible that one VPS will slow the host enough to have an affect on other users. It is considerably less likely for this to happen on a VPS though, when compared to a shared hosting account.