Repro steps:
1) Open the project and test.scene
2) Make sure Static Batch is enabled and Dynamic Batch - disabled
3) Open Profiler and and Play
4) Select Renderer in the Profiler
5) Notice that it shows 7 Drawcalls
6) Disable Static Batch and Enable Dynamic
7) Repeat 3 and 4
8) Notice it shows 3 Drawcalls

Expected: Static Batch produce the same DrawCall count
Actual: DrawCalls sums Batched Drawcalls and not Batches, unlike Dynamic

Reproduced in: 5.3.3p1; 5.2.3p3; 5.1.4f1
Can't test on 5.4.0 due to other bug