[QUOTE=SuperFist;166994]Basically the writer skips over areas of the discs it views as being riddled with defects and writes to more reliable sectors. In essence, cheaper media would have more gaps due to the inconsistencies and lack of quality of the materials and craftsmanship of the discs.[/QUOTE]
IMHO, it should never, ever, do that. The burn MUST be contiguous.
I've burned hundreds of Blu-rays and many, many, more DVDs, and have never, ever, had gaps in the burns.
After shrinking to single layer, the results burned to the 25 GB media (x6) without any issues.