That's why I am not a big fan of providing exact data and saying "I will take 7 days". It will take 7 days on one specific computer, while on other it would take 6 days or 8 days.
In the context of "whether jumbled n-word seed is safe" you are correct but generally speaking stats like this are very useful but as long as they are reported with full details that includes the word count, derivation path, extra word (passphrase) length, and finally the hardware specs.
That way if you are trying to recover a similar case you could have some idea about how long it could take.