These "record breaking" runs are usually only of academic interst, as in normal circumstances, the trains (TGV or others) run at comparatively much slower speeds..
As far our railway system is concernd, it would be better served by improving the whole package, rather than worrying about the speed factor alone..! I guess that trains like the Rajdhani, Shatabdi, etc do a reasonbly good job, considering the fact that they have 17 bogies, and are made to run on normal rails..!
