hi guys, i am only downloading html files since i 
selected 'store html files'. i am pretty sure that all 
the files are being re-downloaded because i am 
monitoring incoming data stream, plus my hard drive is 
writing the data to disk (also, it took the same 
amount of time to perform the update instead of being 
faster).

okay, i will try enabling debug mode and do as xavier 
suggested and will report back with results.