hio77:
Taking my spark hat off for a min.
I'll be honest. Apart from Cloudflare I find sparks routes to be some of the better over other providers for both speed and latency.
I'd be interested to see some comparisons. More than happy to be corrected! I guess that could be a side effect of Spark requiring paid peering to get to them, is that those links are more well managed than a peering exchange where you get a mountain of routes from a menagerie of providers.