Theres entirely no need for an unlocked multiplier, earlier P1's, very early p2's had trouble hitting higher fsb's, lots of mobo/chip combo's wouldn't do past 230ht very well at all so an unlocked multi helped, a lot. These days theres entirely no need for an unlocked multi on either platform except if you're running LN2, the extra multipliers help unlock the liimts up at silly high fsb's/ht's but for any "normal" 24/7 usage, on any normal 24/7 cooling, air, water, phase change, you just don't need the multiplier.
Anandtechs review was, odd, to say the least. They never actually delved right into "could we overclock further/more easily without being fsb limited" and jumped right into, look at the power usage and voltage requirements, then they just ignored the quad core because overclocking it just used too much power? For unlocked chips aimed at enthusiasts, well, its a consideration, its worth mentioning, but at least try and see if it was easier to overclock or get further.
Did they do a single performance comparison, say at 4Ghz with high fsb/low multi/higher mem speed vs low fsb/high multi/lower mem speed, I mean, thats the main thing to look at, can you get further, and if you can, do you get the same performance, and they basically ignored that entire and most important section and just made it about power usage.
I don't doubt they are completely pointless, but the review could have been far more relevant, or they could have done two reviews, one on if the unlocked multi helps you get any more performance in any situation, basically a review for the damn chips.
Then a second "how much power does my system use, how much performance do I need, is overclocking worth it, etc, etc" review and they could have included AMD numbers aswell.