Apple sells to 75% of the market with their standard configurations, 20% of the market with BTO, and the other 5%, well dell and alienware can take those. Apple doesn't want those customers.
That is very immature and extrastupidly naive!!! When profit and shareholders are concerned they care about every dollar they could potentially earn. Don't ever think greed and profit is any priority other than number 1!!!
I don't have any raw stats such as the ones you mention but a quick glance around here and many other forums of late seem to suggest figures closer to 80+% CTO's. I've not seen too many standard config's mentioned anywhere. At the 3 stores I went to today the sales guys all shared the same info, basically every machine was a CTO, everyone wanted the Hi-Res option or the i7 or some other variant. I know this can't be used as an across the board determination of figures but still this small sample provided info opposite of your stats.