The numbers:
Major-league best 18-7 record.
3rd in MLB in runs, first in SB, second in Fangraph's baserunning rating, 2nd in OPS.
9th in ERA (4th in Starter's ERA), first in K's, 13th in WHIP.
They are also 5th in UZR and 1st in UZR/150.
I know it's early in the season, but every possible indicator so far suggests that the current Red Sox are one of the best teams in the league, even though several important pitching pieces and Ortiz have already missed time with injury.