The AS SSD and Iometer benchmarks prove that the Vertex 4 is a speed devil, especially when writing. In PCMark7, the benchmark closest to real-life, the Vertex 4 is not quite as impressive and more in line with other modern Serial ATA 600 SSDs. This is not a new phenomenon. There is very little difference between most modern SSDs during normal daily use.
Slow computer got you down? Maybe a hardware upgrade should be in your cards, if so this guide to the Fundamentals of Upgrading a PC is an invaluable read. PCSTATS Tips