I'm finally able to get back into SL after the A-B database lockout, so my first priority was testing exactly what happens with Search Results for certain conditions.
The one caveat to this test is that I'm still using the First Look beta that was posted just prior to release as the new viewer.
Test Conditions:
* My store has PG content
* My store is on land in a Mature sim
* My keyword was "otokoyaku" because it is used in both my store and my land description
Search Results with Mature unchecked:
For "All": my store is in the listings, the land was not
For "Classifieds": my store is in the listings, my land was not
For "Places": my store was not in the listings (not supposed to be), my land wasn't either
Search Results with Mature checked:
For "All": my store and the land were in the listing
For "Classifieds" my store and the land were in the listing
For "Places": my store was not in the listings, but my land was in the listing
STRONG RECOMMENDATION for store owners with PG content:
Take out Classified ads using all your keywords and keeping the Mature checkbox UNCHECKED.
* Your store will show up in the All and the Classifieds categories, regardless of the rating for your land!
* Take out a separate ad for any mature products in your store (optional)
* Accept that your LAND name will not show up in PG results
It's not ideal, but neither is this the complete shut out that some shop owners have been assuming.
If anyone gets different results, I'd be really interested to hear them.