Possibly true, in the sense that any GCed language suffers in high-performance or soft realtime apps (e.g. games, audio software). However, other constraints might influence the choice of technology, such as existing experience with the available team members, or vendor-mandated technology choices (e.g. Android apps [ignoring the NDK]), or speed-to-market - and therefore development speed - or, debateably, program correctness, is more important.