I guess the "LOL-OK" response to my post threw me off then, ie., interpreted as sarcasm. And the portion I quoted (with...to indicate more to quote)) was that portion I had a difference of opinion. The filter's production date 'may' indicate it was used longer than recommended, or not at all. To me the TG's appearance is the primary indicator for my conservative conclusion. Also why I said, mostly rhetorically, wonder what the valve train looks like.
And much like the unknown fci, the OP's Toyota being a sludger is also unknown and that too is unlikely to change. However, many more Toyota's are not known sludgers than those that are. Again using the TG's appearance as primary basis, it being used longer than recommended or optimal is an easier assumption for me, than an unknown engine.
And for comparison of conclusions on maintenance vs defect, if dnewton's post is noted/read, his opinion is more open to either option than my post.