Gove has chosen a list of traditional academic subjects - it's obvious that traditional and academically selective schools are going to be more likely to steer their pupils down that route. As it happens, I'd quite like my children to gain most of those qualifications, and if they're able enough, there's nothing to stop them in any of the schools round here.
DD1's school is very high in that table, and it will set off yet more 11+ panic round here in years to come - but factor in 'A' level results and its position drops sharply, as though it is very hard to get into the lower school, the 6th form is less selective, and is the main 'A' level destination for children from the other 2 secondaries in the town.
The quality of teaching is as good in the 6th form as it is in the lower school, and most children stay on to take their 'A' levels there and do very well, but by being less selective in its intake, inevitably the average result is lower than it would otherwise have been. Unless you take into account the starting level of the children admitted to the schools, these stats are never going to be meaningful.