I think the Rednova article was just as premature as the yahoo one, I didn't see any mention of tests... They just called it a giant squid.
Correct me if I'm wrong.
**EDIT**
Yep, they haven't actually tested it. They say specimens have been sent off for testing, but not what the results are. Second, the say the only giant squid to have washed ashore previously was in 1896. Which is patently wrong. Thirdly, they say that specimen in 1896 was a squid categorically, which is far from a direct conclusion. Some scientists believed it to have been a giant octopus.
Also, most likely the remains were inside the stomache of the dead whale, when upon death they were ejected.
If you've ever seen a half digested fish, they often become transparent and jelly like.
Finally, correct me if I'm wrong, no giant squid speciment has been found that is even close to that size. 12.4m body length is massive. I think the largest giant squid ever found was something like that length, including arms.
Note, I am not saying it ISN'T a giant squid; but that it is far too early to state categorically.