On 26, for me, the baseline is (1) press the siri button on carplay maps (2) speak destination (3) it shows a screen with a map and blue dot showing my destination, and siri says “Sorry, I do not know where you are.”

The version before that, it’d send me to the wrong destination but typing the speech recognizer output verbatim into maps worked.

So, maybe 27 siri is better? (How could it be worse?!?)