I always thought that "много" and "немало" are synonymous with one-another. Until this remark by Борис Берман shook that assumption:
"Просто в последнее время появилось не скажу, что много, но все-таки немало молодых «деятелей культуры», которые представляют интерес."
Apparently, they're different. So I guess one could sort these adjectives in descending order like this: много > немало > немного > мало.
Is that correct? And does the same thing hold for other pairs of adjectives like высокий-низкий, etc?
In the case of много and мало, does it make a difference if the corresponding nouns are countable or uncountable?
Thanks in advance.