nuclearcat wroteIt is cannot be considered as ISP fault, because in some locations DSP is only Ogero, and in some cases they don't care much about their stuff.
According to their methodology, all four ISP connections that are being compared are through Ras Beirut C/O which is considered to be one of the most stable and reliable C/Os. Moreover, not all are through Ogero.
nuclearcat wroteMy opinion - you cannot judge ISP just by one modem, that's it. You can compare DSL connection on some specific exchange, specific (current) ip range, and specific service type, and not more than that.
Any scientific comparison needs to be very diverse and encompassing. The more diverse, the better but obviously cost is always a limiting factor. However, I believe you're missing the point here. As per their website "
Although this website is named AhsanDSL or ThebestDSL, it is limited to comparing one class of DSL - 256 Kbps"