I average 25-30 minutes for movies with features (or big movies).
With my system (Pentium 4 @ 2.4ghtz, 512mb RDRAM); Memorex F16 (Lite On?) 16x DVD+-R,RW,DL Burner with 8x DVD+R Media) ...
... Nero Recode takes about 20 minutes to encode and burn from a dvd-9 (usually somewher from 6.5 to 8 gigs of data) down to a dvd-5 (4.3 gigs). I always use Advanced Analysis (2-pass) recoding unless no compression needs to be done (DVD-5 that I ripped in file mode by mistake). DVDD (DVD Decrypter) rip speeds vary, I guess based on the source disk and structure protection? Sometimes it rips a full disk in just over 3 minutes at up to 16x, sometimes full DVD-9's read at the highest rate too, and take maybe 5 minutes? Sometimes I only get about 8x reading though, and rips might take 10 minutes. Maybe I'm slowed down by my hard drives being nearly full some of the time...
I Always target my Nero temp files to the C: Drive (an 80gig Western Digital 7200rpm I-IDE) ... my rips go on my other 3 hard drives wherever space is available (200 GB WD, 250GB Maxtor, 300GB Maxtor I-IDE [Equals 0.83 Terabytes total... gotta get one more to push me over the hill]. I use to keep the temp files off the C: drive but haven't noticed any difference.
My C & D drives run off the motherboard ATA-100 connection with the Intel Application Accelerator ... My E & F Drives (the Maxtor Drives) are attached to an Ultra-ATA-133 PCI Card by Maxtor. I don't know if that gives me faster speeds with those drives or not; since my motherboard chipset (Intel 850E) is only ATA-100. Anybody know that?
Anyway, these captures are from a compression of "Seven" Disk 1 (7,657 MB to 4459 MB) I just did.
I like ripping the DVD to the hard drive first ... I think that results in faster times overall. Plus, if something goes wrong, you still have the source.