[jacquesm]

It does if the number is '0' vs 'some'. It usually depends on how and where you do your hiring. For those that only want to hire local developers it is very well possible that there are no local Rubyists, it is also possible that it is the other way around.

Typically there are a lot more proficient PHP programmers than Ruby programmers around here, but if a company were open to remote workers the situation would right away change considerably.

There is also the price factor to take into account.

All in all, more often than not developer availability works itself into these choices.