you should get ~100kbps download speed in ur case. 90~95kbps is fine m8.check whether ur background programs ( anti-viruses (auto update features),virus,updating/upgrading softwares/ browser/news/malware etc) is not eating up bandwidth.in case of youtube video for me it's also buffer a bit (512kbps 599UI plan ~ 50-60kbps) it depends on network traffic n ur youtube settings for video quality setting (HD/normal) like 720p/480/360p select the lowest for better result.as of the speed test ur old 1 might not be capped 1's as they filter the speed after some days(some ppls are luck as they get 2mbps speed for few days).