NSC I-485

1. Does I-485 processing timeframe depend on the category (i.e., EB1-a, EB1-b, EB2-NIW, etc.)?
2. Does I-485 processing timeframe depend on concurrent filing/or not (i.e., Concurrent filing is faster than non-concurrent filind)?

In words, does I-485 have memory back to its I-140?

Thanks!