Yes, you are! You are linking to one single accident on a conventional line. It's not like the TGV would not be prone to accidents in the same low-speed situation :-) Also, Siemens was only one consortia member for that train, but made the trains currently commissioned for the highest speed, Spain's S-103, completely, while the TGV Est sees parallel service of German ICE-3 and French TGV POS (<-acronym in a civilised right-driving language, Paris-Ostfrankreich-Süddeutschland!) at the same top speed :-)

Is this true about Alsace? Even the TGV Est line?

Yes, it is true. The TGV Est line hasn't reached Alsace proper yet, presently the end of the line 'solves' the change-over (I can testify from travelling both via Strasbourg and via Saarbrücken).

_{*Lunatic*, n.
One whose delusions are out of fashion.}