Wait, what? Did you just say that having a lot of applications on your iPhone does NOT lower the iPhone's performance? Have you been drinking? The iPhone is just like a computer. When a computer has very little free space of its hard drive left, it tends to be very slow. When the iPhone's hard drive is so bogged down with useless apps that you don't use, it takes a hit on it's performance, especially with the iPhone's low amount of RAM. So no matter what you say, having a lot of apps does lower the iPhone's performance. It's a widely-known FACT.
P.S. You can't have over 9,000 apps on your iPhone and iPod Touch. Not enough space. That is, unless you jailbroke them and hide them with Poof. But even then, I doubt the hard drives are big enough to hold over 9,000 applications. You make me laugh. XD