wbmw,
Not in the beginning. It took years to promote PPro as a viable alternative in the enterprise. Intel couldn't do it overnight. And versus RISC, they had the benefit of huge economies with inexpensive Linux operating systems, vastly less expensive hardware, and huge 3rd party infrastructure.
x86 was in the enterprise for a long time, but mostly on the department and in the small to mid sized companies. The OS of choice in that time frame was of course Novell, with Windows gaining share. Linux in the enterprise is a much more recent phenomenon. Linux started out in web servers on x86.
Joe