that's a generalisation...
from what i have seen, spark plugs are generally either gapped at 0.8mm or 1.1mm in their "factory" form
eg NGK coppers: BCPR6ES-11 or BCPR6ES - both the same plug, both brand new, and as you might guess one is 1.1mm gap and one is 0.8mm gap
so they might be gapped to 0.8mm or they might be 1.1mm. with the symptoms he has described i still have my balls on 1.1mm gap as the source of the problem. If hte gaps are already 0.8mm then i take my balls off the plugs and putthem on coils as the problem
either way, its not too serious
of course it could be something different altogether - i can only suggest what i think based on my personal experiences... i'm not a mechanic
cheers,
Warren