Gibbs is getting less laughs then usual

Politico did some unusual analysis of the press briefings of Robert Gibbs. This is what they found out:

But the laughter has been reduced by half in recent months: In the first six months of the Obama administration, briefings produced an average of 179 laughs per month. Over the past six months, the average has dropped down to 89.

The point of all of this?
That the press may be getting tired of the same old excuses and 'aw shucks' 'did we do that?' attitude of the White House.