I use iPad3 and iPhone5.
Before comicglass 6.0x version is good to view pdf files.
But after 6.0x update, page changing speed is very slower than old version.

I tested on iPhone5 at iOS7, and
iPad3 at iOS6.13 and iOS7.0 and iOS7.02.

At iPhone5 iOS7 OK, but iPad3 on iOS6.x and iOS7 .x is not OK.

Sorry for the trouble.
I changed the depiction quality of PDF.
Once, please change a "PDF optimize" setup of a detailed setup. In the Retina model of iPad, since the size of the picture to generate is large, it may take time.