IInuyasha74 :
Well, they have had their "Extreme" products which are more OC friendly and enthusiast oriented since the Pentium 4 days. And yea BCLK OC was possible with the other CPUs, but extremely limited.
Yep. I had one. A S478 Pentium 4 EE, the first CPU with L3 as well.
But same can be said for any company. The AMD FX series was their top silicon that was best for OCing as well. BCLK overclocking has always been somewhat limited, multiplier is always better.