As it is said here less - definition of less by the Free Online Dictionary, Thesaurus and Encyclopedia.

adv. A comparative of little. Less. Used before a participle: a lesser-known writer.

My question would be: Is it the case most of the time in a colloqial speech?

Sometimes I can see things like

a less-known writer instead of a lesser-known writer.

And here most of the people think that less is better while it should be lesser if we follow the dictionary

Grammar question: Less or Lesser or Least? - Yahoo! Answers

the lesser organized style or the less organized style

I understand that the lesser-organized style is a norm. What do you think?