My memories are different. Macs were run by media guys for graphics, video and audio. Tech nerds used, sure Windows, DOS, but also Linux already, many types of Unixes, Netware, Commodore Amiga, Atari ST or Falcon. But Macs? No!
My own experience was learning on an old IBM PC at school, then Apple 2s later. Also my dad was a programmer (but maybe less nerdy/more professional) so I got second hand x86 hardware and learned to program on Windows with Visual Basic, Delphi and Visual C++ (since he already had licenses). Eventually I got into Linux in the late 90's.