Was it really focused?

.
When the G9 has acquired focus, it actually beeps twice (very quickly) and the AF frame on the LCD is green. If the G9 is confused about the focus, it beeps only once and the AF frame on the LCD is yellow. Granted, the beeps are difficult to distinguish and sometimes the yellow vs green is not so obvious either but this is the way the G9 tells you that it thinks it is focused.
.