for a loooong time I thought he shouldn't have been anywhere near the england team and owed his continued selection to a variety of factors from having a cricketing history, being a good looking, quite dashing chap (this does definitely play a part in how we relate to people) and scoring a few gritty 50s when england were in a lot of trouble. none of these reasons were bowling orientated.
furthermore, I'm sceptical as to whether "blooding" players young is worth it. compare the extensively blooded Bell to the Trott, who came into the side at 28 and instantly established himself before bell. Hussey, Swann, Clark, Ajmal are other playes that just came into the side late and just applied their experience with great success. I think if a player is good enough young (whether because they are actually talented or there's just no one else better available) then fine, but Broad got a long stretch of not being one of the best 3 quicks in england but getting constantly picked. I think that point goes along with the thrust of that article, security is one thing, but picking someone so consistenly in spite of under-performance will breed complacency, Bell hasn't really benefitted from the blind faith put in him (in fact, being that he's on 80 test caps I'd say he's on course to be one of the worst and least deserving 100 capped test players ever)
however I think Broad of late has started to justify some of the hype (the UAE particularly) and it's maybe a bit ironic him getting called to be dropped as I think the implied successor is Finn, another guy not really among the best bowlers in england but someone people think is worth sacrificing a space in the attack for which to blood him.