cydwhitIt is ridiculous, it seems like modern man has still not figured out a good way to burn a DVD. I wish we could switch delivery methods but that is kind of the point, home videos to DVD....
I mean, trying to cram modern expectations into a 20 year old technology is hardly realistic. It's like trying to stream Netflix on a dial-up connection. Modern man instead invented better technology that doesn't have DVD's decades-old limitations.
I'm sure you know, DVD burning is bottlenecked at two points. The first is transcoding to MPEG-2. All DVDs are MPEG-2 formatted. If you drop a iPhone Quicktime into Encore or Toast, the "transcoding" step is turning the video from an MOV to an MPG/M2V. You might be able to speed up this process by encoding your videos to MPEG-2 before importing into your burning software. For instance, if you have a CUDA accelerated system, encoding your videos in Adobe Media Encoder and then importing into your DVD software (and therefore skipping the "transcoding" step in the DVD software) will be faster than importing the Quicktime file into Encore or Toast and letting the transcoding occur there.
If you can record directly to MPEG-2, you'll be able to save a LOT of time. Matrox's MX02 Mini device will capture directly to MPEG, so you skip the transcoding step in your DVD software, but it might not work with your workflow. The other direct-record option is to play out directly to a DVD hardware recorder that records in realtime. If you can describe your workflow in more detail I can probably offer more concrete advice.
The second bottleneck the actual burning part of the process where the laser etches the disc. What write speeds are your DVDs and the DVD drives? (16x, 18x, 24x...) Theoretically, the faster the DVDs and the drive, the faster the DVDs will burn, but in reality there isn't much time difference between 16x and 24x. Obviously the discs will burn quicker if there is less data being written onto the DVDs, so compressing the MPEG-2 files more will speed up the burn process, but there isn't a lot that can be done here if you're already using fast-write DVDs in a fast optical drive.
This turned into a long tech-intensive post, but hopefully this helps a bit.