I'm not sure about that. There is one advantage to being paired with someone with a slow machine. Sometimes that other person will get a higher claimed credit than you do. If both work units are validated, BOINC awards credit based on an average of the two scores. That will boost the granted credit you're awarded.

The quorum process is sort of like going on a blind date. Sometimes the other person turns out to be drop-dead gorgeous, while other times he or she may be the date from hell.