Alcohol affects vision, balance, coordination and judegment. The more
of it you ingest, the more these traits are adversely affected.
Therefore, if you were to plt a graph with "skil level" on the y-axis
(vertical) and blood alcohol content on the x-axis (horizontal), with
higher skill up higher on the y, and more alcohol farther to the right
on the x, the line on the graph would start high on the left, and
slant more or less straight down towards the lower right. This is
definately not a bell curve. In a bell curve, there is an up portion
of the line, then a stabilization, then a down portion. There simply
is no "up" portion in a graph of blood alcohol level vs. "skill level"
where I take "skill elvel" to represent ability to do meaningful work,
which involves vision, balance, coordination and judgement.
Even if you perceive a psychological affect of performance enhancement
after a few drinks which you attribute to increased skill level, the
line on the graph represented by this would only by a slight upward
blip, and not the prolonged, sustained upward trend as seen with a
Google search strategy:
"effects of alcohol on performance":
"blood alchohol content graphs":
"blood alchohol content":
Hope this helps,
Google Answers Researcher