That's not my experience from ds1 (now in yr9).
There is a huge difference/step up for secondary because they are being taught by subject specialists, which is a massive benefit from primary. (Except for in some mad schools that do these "learning to learn" curriculums.)
Where particular areas of knowledge are repeated, the standard at which they work should be much higher. For instance in history ds1 covered - I think the battle of Hastings. But whilst in primary he did this through project work and so on, in yr7 he wrote a serious essay on the subject including independent research.
ds2 (yr7) is currently doing lots of baseline testing to identify where there abilities lie, and also to monitor the yr6/yr7 dip. (Where children stop being crammed for SATs in early May, then do very little "work" for 4 months.) So, for instance in Maths they have all just sat a completed set of yr6 Maths SATs papers. ds2 is very able in Maths, and this hasn't phased him at all. He took it as a challenge to try and get 100% in the tests.
There is more overlap/repetition in MFL, but this is inevitable when the feeder primaries all teach different languages to different levels. But ds2 is enjoying that too and is still "learning" and making progress.