Will a faster router improve powerline networking throughput?

I recently installed the bundled product including the XAV5101 and XAV5004. My goal here was to hopefully be able to stream fairly high bit rate HD videos from a PC on my network to a PS3. The product did provide substantial performance over wi-fi, but fell short of my expectations.

My house was built in 2004. The router and PS3 are about 50' if you run a cable across the floor somewhat as the crow flies, so the electrical wiring is going to be a bit longer of course. Reasonable situation I would think.

I noticed a big difference in performance running a cat5 Ethernet cable from my PS3 to the router vs. powerline networking. On a cat5 line I am able to stream 50-60 mbps video without any issues. My router is an older Netgear WNR1000 that only has 10/100 wired ports. Despite the LED indicators telling me that my network connection is 80mbps+ I found I could not stream video around the 50mbps mark without stuttering and quality problems.

I called Netgear tech support and explained this situation. They told me a faster router would improve the performance of the powerline network. Is that likely to be the outcome - in this situation where a direct hardwired connection is already outperforming powerline?

Thanks