Although Apple's June quarter is typically weak, the company appears to be headed for a strong summer this year. Studies show an increasing number of "switchers" heading to the Mac platform, with concerns over security with Windows computers driving switchers to the Macintosh. Apple specialists at independent resellers told researcher PiperJaffray that 16 percent of customers who buy a Mac are switchers. At the Apple Store, about half of all purchasers are PC switchers. Apple specialists also said about 70 percent of "switchers" make the move due to security and stability concerns with Windows. The majority of Apple specialists feel Mac OS X 10.4 Tiger has had some effect on Mac sales. The iMac G5 is said to be the strongest seller among switchers and repeat customers, with PowerBooks being second in line. iPodNN reports that , and the iPod mini is the top seller at the Apple Store.