An Apple touch panel supplier, Wintek, saw its sales increase 40 percent month-over-month in March, according to Ticonderoga Securities analyst Brian White. "We believe Wintek's March sales surge highlights the strong ramp for the iPad 2," he notes in a memo, "and we expect to get more details from the Apple supply chain over the next week as monthly sales from TPK and other suppliers are released." Wintek's average March growth rate in recent years has been about 16 percent.