Apple is under some intense competitive pressure these days, particularly from Samsung and its omnipresent Galaxy S4 flagship smartphone, but at least one analyst sees the company weathering the storm until it releases its next-generation iPhone 5S in the fall. Per Barron’s, Detwiler Fenton research director Mark Gerber says that iPhone sales in North America “remain resilient” despite the added pressure it’s facing from rival vendors. Gerber says that while the Galaxy S4 has sold well in North America so far, its total sales are only up 15% over where the Galaxy S III’s sales were at the same time after its release last year. The result, he says, is that while Samsung continues to dominate the Android market in North America, Apple’s overall market share will likely remain mostly unchanged.