I tried both download speed throttling and putting TiVo in standby mode. Neither had any positive effects for reducing glitches. The only thing standby seemed to accomplish was to speed up transfers. About 20 downloads of the same show for all kinds of combinations of standby, no standby, speed throttling etc. All had corruption points in different spots according to tivolibre -d option. There wasn't a single download with no glitch at all. But at least to me VRD does a great job of cleaning it up such that I rarely notice any problems for decrypted shows.