Uh-huh- hence he doesn't say "this pilot is lucky," he saysd
"The Force is Strong with him!" Jedi substitute the Will fo the Force for luck- with a slight contextual difference,. becauser it can mean skill as well. It is meant to represent his current good performance- if the Force is with you, you cannot fail.
And as I have said, Luke was not using the Force, aside from good reflexes, when Vader said the line. And Vader does NOT sound lime someone who is surprisrd to find a Force Adept! He sounds like someone commenting on a tricky kill!
Vader's line has become synonomous- certainly with my friends- to someone being lucky/skillful. I have never had one moment in which I doubted his meaning.
And if he could have picked it up from such a vague source, then he WOULD have detected Leia.