My understanding of the present consensus is that most doctors believe light drinking is slightly superior to not drinking, but both are vastly superior to heavy drinking.

On calorie restriction, there are a bunch of different methods being recommended of potentially useful calorie restriction. If you're not knowledgeable enough to distinguish between them, then it doesn't sound like you know enough in this area to consider the science well established. My own impression is that it is not well established. From a quick google search, the very first paper I came across states:

Whether prolonged CR increases life span (or improves biomarkers of aging) in humans is unknown.

The second paper I found is more recent (2011) and states:

It is difficult to definitively answer whether or not CR prolongs human life because of the ethical and logistical limitations of research design.

Given that G0W51 did provide references for his claims, I don't consider it reasonable to claim he is in error without being able to provide sources yourself.