Ok, I just wiped my phone and I'm installing the latest leak 448 as I have tried it and it was the snappiest of the 9780 OSes so far....I will report back
have in mind, that after a reboot the Search Index of the Global Search will be updated in OS6 - at the same time (after a reboot) FileScout will read it's cache files (if not turned off in the options). When both is running it could slow down the device for some moments. There are several options to deal with that:
1) Lower "Background Data fetching Thread" priority (FileScout Option)
or
2) turn of the "Use runtime Cache" completely (FileScout Option)
or
3) simply live with it since this really should be for a few moments after your device was booted (Global Search Indexing can run for quite a while depending on the amount of data you have installed on your SDCard)