Just read your question....

No they are not.
The 4.4mm small end version was, but the current version isn't.

I race them hard, and reached 10 liters (2 gallons) on 1 rod, to test it's durability.
Even after this there was no visible wear compared to a new one!...
Don't forget that a rod gets a lot of stretching during his life, so no visible wear does not mean it is not tired and can snap.....