I agree...I think the GFS has done a pretty decent job overall, especially with the tossing out there of flags putting a halt on higher heat and humidity ever really getting into the region...at least on a consistent basis.
I know we had a pretty good discussion going on last week regarding whether temperatures thus far (not just max's but min's) have been above-average or below-average. But you bring up a great point about how much the departure's have been from average. It just always seems we're somewhere in the +1 to +3 range no matter what. Even if we get a month which starts off below-average we're still ending up somewhere in that range.
Given how strong of a CC signal we seem to be having, you have to wonder if perhaps 30-year averages is actually too long of a scale. Not say this should be abolished, but maybe there should be another data set created which has a smaller time-scale (like 15-years). we're obviously warming at a pretty sizable rate...and whether that is just the Earth going through a cycle, if human influences are driving it, or a mixture of both doesn't matter...the warming is happening.
But I wonder if just looking at a smaller climo period would actually yield data or results which just may be more realistic or more representative of the current state. If we were to compare daily's now say to the past 15-years as opposed to the past 30...how would the data look? Quite certain these higher departures would be much closer to average...but all this does is really hide or dampen the truth of what is going on.