I just want to check my understand is correct on this explanation. Essentially at stock IB is more efficient than SB, a touch faster clock for clock and uses less power. However when you go past a mild overclock the efficiency fades and by the time you're at 4.5Ghz you're drinking more power than SB, and the smaller, more compact CPU is struggling with the heat.

So IB is still a fair choice for moderate folks who aren't likely to go beyond a 1 Ghz overclock, and who may run it at stock for a year or two until something arrives that actually taxes it?