Did you read the article?
Sounds pretty solid to me. These sort of benchmark leaks occur just before a release quite often. It's likely a controlled leak from Apple.
Did you read the article? They make no mention of the benchmark and only reference "trusted sources" as well as explicitely stating "rumour".
At this point nothing is confirmed. And whilst geek bench results have been found in the wild previous to releases, it's by no means a common occurrence that happens "quite often".
If by the time you come to replace it you need an ethernet port, buy the 17" or get something else. CombatSquirrel is right below...