It's too soon to tell, but Samsung might have finally beaten Apple to become the United State's top smartphone maker, at least for now. A new report by the investment research firm Canaccord Genuity shows that Samsung beat Apple in US sales in May. In particular, Canaccord found the Galaxy S 4, Galaxy Note II and Galaxy S III sold more units combined than Apple's iPhone. It's important to be aware of the methodology Canaccord used to develop their findings. The study surveyed only the retail stores of carriers AT&T, Sprint, T-Mobile and Verizon Wireless. Apple Stores were not surveyed....