Triples are over rated in terms of thermal efficiency and cost effectiveness. They are quieter though.
Erroneous on both accounts.
Since when is a U-factor drop from 0.30 to a low as 0.15 overrated in terms of thermal efficiency. Sure, if a company is charging twice as much for it than it is not a good deal, however, quite a few companies only charge about a 20-25% increase. Well worth it at that point.
Triple pane windows are far from quieter and often times allow for slightly more noise transmission.