> These are factors not related directly to the language, but level of understanding, time, and money. An experienced C++ programmer can probably implement the 'better' algorithm equally quick in C++.
There are programmer performance factors directly related to language differences.
The mainstream example is efficiency of DSLs. Try writing a complex regexp in a standard regexp DSL that originates from Perl and in plain C/C++.
The less known example is writing complex business logic in Clojure vs Java. The very fact that Clojure version lets you examine much more business logic in one screen without scrolling puts much less pressure on programmer's concentration and memory.
Thus the very ability to write complex business logic without lots of bugs in tight time constraints depends on a language.