I just took the survey and chose option 1 (factory-applied wet wings, never resealed) for my 1969 M20C. That is the most applicable of the given options, but it doesn't tell the entire truth. Yes, the tanks have never been completely resealed, but both have been patched during my ownership, and the left tank has a slight weep again (acceptable per Mooney's guidelines).
So I have neither resealed the tanks nor ever installed bladders, but I'm pretty sure I'd go for reseal given that the current sealant has served for 40 years.
One thing I wonder, after reading all these posts that concern 30 lbs. here and there, is what the total amount of sealant in the wings weighs. Does the bladder installation account for removal of the old sealant? Or is that weight included in the 30-whatever pound hit for having bladders.