That's good news for me given I'm running on LPG (propane) with a (UK) octane rating of 100+ (regular here is 95, premium 98).
My (turbo) smart had the same adaptive function. For years I ran it on (UK) 95 due to availability but changed to 98 when I moved to another district. No immediate change then after the third tankful it became a lot more responsive and gained 5+ mpg (45 to 50 minimum). I'd never believed the 'it takes a few tankfuls' line - until I had it happen that way. IMO, if the engine can configure itself for higher octane it is well worthwhile using it. But only if it can exploit it.