Not sure where everyone gets their info, but pay in CS isn't so much by your class of honors but by your ability to game the interviews. That itself is another bag of worms. The pay range is correct though. There's something like a double median distribution, one for tier 1 firms like google & other tech giants, another for tier 2 firms like grab, shopee. Then there's tier 3 that's probably DBS, ST & the like. There's also gov or statboard jobs but those pay somewhere around tier 2, but with engineering culture from 3. Tier 1 should be paying 6-8k, tier 2, 5-7k.

The culture and pay varies from firm to firm, so hard to say conclusively. These things do matter though.. amount of OT, traveling distance, engineering culture, job scope, really affect the actual amount of hours you put into your job.