+1 to wolf-hunter!!!!!
Buying a new single core processor in 2010, is like buying a charcoal oven for everyday cooking. You'd do that only because of affordability issues. And even then, the price diff is almost non-existent.
In any case, single core is dead technology. I did'nt know, that they still sell that stuff outside the third world, really.
Can we make do with it? Absolutely.
Is it normal though? Hell no.
These days it's more like : "Do I need a quad, or will a dual be alright for me"