Do sigops count towards the block weight in SegWit?
No. The block weight is only calculated from the bytes themselves, not the sigops. Accounting for the sigops would need a hard fork, as explained by the section above the example:


  It is not possible to solve this problem without either a hardfork, or substantially decreasing the block size. Since segwit can’t fix the problem, it settles on not making it worse: in particular, rather than introducing an independent limit for the segregated witness data, instead a single limit is applied to the weighted sum of the UTXO data and the witness data, allowing both to be limited simultaneously as a combined entity.