My zone SWR is one that gives huuuuuge slack to avoid delays. Plus, timetables and MPS are generally slow without any reason. SBC - JTJ (minus the Mulanur - Patchur ghats) and SBC - DMM (minus the Makalidurga ghats) should be 130 certified. Post doubling/electrification, SBC - UBL should easily get 130.
SBC - MYS being FEDL has too many curves and MPS of only 100, which is atrocious.
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Cleanliness, quality of services, punctuality are all good in SWR. But speed? Never.