I guess I don't understand the problem, are you saying that you think its too slow or that your having issues with google or what? You gave great background info, thanks for that, but you didn't clearly state what the issue is.
Those look like public proxies and as I would assume they won't perform well with google as they get blocked quickly. Also there are many different google bans, which I talk about in the video below, so it depends on the query your using and your buddy, so you may be comparing apples to oranges.
You could also try out V2, it has over 20 engines built in and you could go to town and scrape a mountain of urls in a short time with 3300 proxies.
http://www.scrapebox.com/v2-beta
Video
https://www.youtube.com/watch?v=P9CbGhfc1aY
Those look like public proxies and as I would assume they won't perform well with google as they get blocked quickly. Also there are many different google bans, which I talk about in the video below, so it depends on the query your using and your buddy, so you may be comparing apples to oranges.
You could also try out V2, it has over 20 engines built in and you could go to town and scrape a mountain of urls in a short time with 3300 proxies.
http://www.scrapebox.com/v2-beta
Video
https://www.youtube.com/watch?v=P9CbGhfc1aY