Our school has a mix of stuff. The ones I usually use are Pentium 4 2.4 Ghz 256MB RAM systems. The lappies are 1.6 Ghz Celeron M's or Turions of unknown speed. The library has mostly 1.8 Ghz Athlon systems, while a few are X2.
Slot 2s are PII and PII Xeons only. You're talking about Slot 1 CPUs. Also, Slot 1 competed a lot with Socket 77, due to the K6s from 300-550 (600+ OCed)