“Vermouth coated ice.” Pish, tosh. Either buy good vermouth and make the drink like a sensible human in the proportions given, or just admit that you hate vermouth for some unexplained reason.
Seriously, how can you dislike vermouth but admit bitters?
(The 15:5 comment is simply nonsensical)

Our maths tells us that this is a 15:3 (not 15:5) ratio. Or are we missing something?

So I have tried this twice, both made with Monkey 47 gin and Dolin Vermouth. The first time I followed Dick Bradsell's version as I had just read his article posted on this site. While strictly speaking not a "true" Franklin" it uses the same ratios but lemon as the garnish. Tonight I used the above recipe, and interesting for me, although my preferred Dry Martini is a 10:1 ratio with lemon garnish, between these two 15:5 versions, I preferred the above recipe with the olives and orange bitters. Go figure.

The Martini has spawned the dumbest array of technique variations. But I fall for trying every one of them. Y'all just like chilled, diluted gin. Cracks me up. Posturing science out of sousedness.

Yes. 15:5 is 3:1. 75:15 is 5:1 or 15:3 so where does 15:5 come in? Or does "dumped" mean it has been abandoned?

Has a real punch. Very spirit forward and very good. Again, use the best ingredients you can afford. Will definitely have again.

This is an excellent way to make a Dry Martini. Out of curiosity, what does the 15:5 imply?