Bladelings and old age?

Well, now that my Adamok Ebon conversion has been posted in Cage Rattlers, I think it's time to finally raise the question that's been bugging me for some time:

How long do bladelings live, anyway?

PS3E rtf chapter says: Adult at 17, middle-aged at 50, old at 75, venerable at 100.

Rip Van Wormer, whose writing most of us know & love, says: they are effectively immortal, as in "don't die of old age". See >here<

At first, Rip's version struck me as an odd choice. However, after checking out the 2E racial timeline of the bladelings, something came up.

According to Planes of Law and Uncaged: Faces of Sigil , the bladeling race came to Acheron from elsewhere at some point, quite a while ago. They were promptly attacked by rust dragons, and had to fight them off with great difficulty, being partially metallic and all. Adamok Ebon is a warrior priestess that took part in those wars. Eventually, the bladeling race had developed an immunity to rust attacks, and Adamok left, her dragonslaying skills no longer required. Today, she lives and works (for the loveable Queen of Crosstrade) in Sigil.
So how old is she then?! Adamok I mean, not Shemeshka.

One of the following must be true:

1) Bladelings age normally but are an extremely young race.
(Not supported by any source I know of.)

2) Bladelings age normally, and they are a relatively old race, but Adamok somehow got to stick around since the days of the "rust wars".
(How? Astral and anti-catching-up githyanki spells?)

3) Bladelings are ageless, as sage Van Wormer claims, Adamok is an ancient being that's still around for some reason. (Raises issues with playability of bladeling characters; minor issues, IMHO)

Discuss.