Fast or slow Internet speeds can be a deal breaker for South Whidbey real estate agents. Candace Jordan with John L. Scott in Langley estimated that 90 percent of her customers inquire about Internet speed, a testament to the pull web speeds have with people looking to buy on South Whidbey. They’ll have something to boast about in the coming months as Whidbey Telecom works to create one of the fastest Internet infrastructures in the nation to be used by residents, businesses and government…