From Hydrocarbon Processing: Valero looks to boost refinery processing capacity for light, sweet crudes

"Valero said it was spending about $500 million for new equipment at its refineries in Houston and Corpus Christi, Texas, to increase their light, sweet crude refining capacity by a combined 160,000 bpd. The company was also planning to ship more crude oil from Texas to its refinery in Quebec City," Read the full article here
To me, the most telling quote is "Recent drilling innovations, including hydraulic fracturing, or fracking, have helped ExxonMobil and its competitors develop oil fields once thought unprofitable...."

So while traditional sources of oil are getting heavier and heavier, causing processing issues, it seems that fracking is producing the standard light, sweet crude that the refineries were built for. 

Where do you think the market will be in the future? Relying on heavy crudes or light, sweet crude from fracking?