Sybase IQ 15.0 introduces significant enhancements in performance and functionality, including improved load performance, a new three-byte fp index for better data compression, and a sophisticated parallel architecture for query processing. It emphasizes the importance of real-time decision support, aiming to boost competitive advantages for businesses. With features like subquery optimization and logical data partitioning, Sybase IQ 15.0 strengthens its position as a leader in query performance.