Yeah blue has had a lot of good decks that support it, but I am not too sure it is the best color. One of the most constant well performing decks is sligh. First place decks bump around, but usually some version of sligh or burn is right up there. Counters are good and everything, but they aren't super powered disruption. Their biggest problem is dealing with the fact that pretty much all of them require more than one blue mana to play. Sure there is Force of will, misdirection (I know it isn't a counter but it is fun and almost works as one), foil, thwart, etc. but there are a lot of good free spells for other colors too, just not as many since disruption in the other colors doesn't cost that much. I deck that saddens me that they didn't keep coming out with good cards for it as constantly as sligh or burn is discard. Sure once and awhile you get really good discard, but they are few and far between. At least they keep reprinting duress, but poor hymn and Unmask. Mind Twist is a great card too. Megrim is crippling to some decks, espeically blue draw that has to discard as part of the ability or has too many cards in its hand. Necro is an awesome and according to some broken card. There is a reason that the tutors are restricted and banned, because they are really good. Bargain also was awesome despite its huge mana cost. Dark ritual was so amazing I am surprized they didn't stop it sooner. But enough about black, let's talk about white. BALANCE ANYONE?! How about Academy rector? You know that one card people wanted banned or restricted which I think makes it the first creature banned or restricted. Orim's chant and Abeyance are incredible disrutpion. "Protection from" spells are just great in so many situations. A particular example, story circle, comes to mind. Worship is great. And talk about awesome creatures, Serra Avatar is a particular favorite of mine, mostly because of another white card called spirit link. Let's move on to Green. Deranged Hermit has been used for how long? And used in how many decks. Yes most of those decks where blue, but not all of them. Regrowth is another awesome card. Oath of druids, survival of the fittest, there are more but this post is already pretty long. So my point is that even though blue has dominated tournament play, it isn't just because it is a better color, it is because they make mistakes and then try really hard to overcompensate for it. They do it with blue too. Just they keep coming out with great cards, and blue seems to be favored. Artifacts also play a big role in many decks especially blue to provide that much needed mana boost for all the spells they draw, which I notice are usually artifacts. Go figure.
But anyways, Skullclamp. Awesome card, but it has a flaw. Just like almost everything else it is only as good as what you abuse it with. With the new sets everybody screams artifacts. This is a problem. Depending so heavily on one type of card gives you a very big disadvantage to disriminante spells. Kill switch, Hurkyl's Recall, Rebuild, etc heavily hurt it. You could use green to manipulate it too since those stupid little elves have this way of massively producing mana and lands, then dropping something like Multani or maro or something. White, Empyrial Armor heavily makes use of an abnormal hand size. Whatever I am going to stop now since I wrote so much. In summary, good card, lots of potential for advantages and disadvantages.