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google also favours updated content .... hence fresh tags,
i think changing the title will absolutely have an effect (even just shuffling the words) but i don't feel longevity of the title is a factor, more the positioning of the words.
I don't know about valuing cosistency (that could be called staleness), but Google values relevance. That is a more important considertion, IMO.
On the other hand, shuffling the words will matter, and there is no way of knowing if it will be good or bad. Obviously you can always change them back though.
I've found that the sites that I've done best tend to have a fairly steady rise up the rankings without much tweaking.
Congrats on doing it right the first time! :)