No, it isn't enough!
If incremental CC is off, then `max_slice_pause` == `total_slice_pause` == `duration`. 

Existense of `(max|total)_slice_pause` just proves that incremental CC is avaliable (i.e we are on `mozilla29` and above), nothing more.
Check it with `dom.cycle_collector.incremental` and `javascript.options.mem.log`!