Generally speaking the average position is there or thereabouts. To be honest we don't check it, as it affects the CTR if you do an impression without a click.
As you know the true test will be the sales volume. Tell your client how great the sales results are. Period. They won't care if they are 1st or 54th.
In actual fact the stats are of immense value. Because of their inaccuracy many advertisers will be lulled into thinking that they have campaigns set up sweetly, when the reality will be the opposite.
In the absence of advertisers or historical data, Google default to <0.1 on keywords, this tends to make a lot of advertisers go look harder, when often they don't need to.
Eventually, the data will be accurate, and when that day comes the game will be well and truly on, at the moment the competition is thin on the ground, often the other advertisers bidding against you are there by mistake (they are not using phrase or exact match and get shown for searches that on the face of it seem relevant but in reality are not).