Source is my own two decades working in the criminal justice system, as both a prosecutor and a defense attorney. But perhaps your experience as an attorney differs from mine.
>> "1g of cocaine might get 10-30 days"
> Source please.
Google: how many days of jail time 1 gram cocaine california
As with many legal questions, the matter of jurisdiction comes into play. Possession of any amount in Texas, is supposed to dictate a higher length sentence on average. Florida, heavier than CA but far less than TX guidelines. In actuality, courts tend to sentence based on defendant history and current political climate.