Agreed. While asking the patient to check is BGL works and is nice to have on arrival at the ED, if you're thinking "damn I wonder what this guy's sugar is?" you are not going to be getting him to check it for you. Maybe if you're lucky he can speak coherently.
For the record, both CO and MA allow for basics to check BGL, I honestly see no issue with this as it should be unlikely to delay treatment or transport if done correctly. And as another poster mentioned, it's great on P/B trucks to help divide the patient load (if appropriate). having the basic be able to use the glucometer is also useful during IV initiation, the medic can finish the IV while the basic checks the sugar quickly.
Incidentally, I've heard that BLG monitors need to be calibrated differently to use blood from an IV. Is this true? And is there such a difference between the numbers that it would make any difference clinically? Despite hearing this, not once have I ever been on a truck (ALS or BLS) that carried anything beyond your standard OneTouch meter.