There shouldn't be, no.
If Windows' internal secret random performance test was fast enough, it will have automatically disabled Superfetch.
Regardless of interface or speed, seeing an SSD, Windows should have automatically aligned the partitions.
Regardless of speed or interface, Windows 7 should ignore the SSD when it comes to defragging (the service being enabled is not an indicator that it is doing any harm to your SSD).
Also, Windows 7 by itself isn't the storage I/O pig that Vista was, and those IOPs savings benefit users of any supported drive technology.
Getting the most out of the drive in XP or Vista can take a little more work, but 7 has good defaults; so you pretty much need to (1) not clone/migrate from a HDD install, and (2) make sure the driver can use NCQ, which is the main point of turning on AHCI (MS decided that their AHCI driver would be needed all the new fancy SATA features, like NCQ, hotplugging, and TRIM, without using vendor drivers).
I'd go ahead and run a WEI test, just to make sure Windows caught up on the changes (as long as the numbers are as high as expected, the score itself doesn't matter), and leave it at that.