1-2 days is slow but acceptable I think. It's a compromise.

But for some reason for me it's much slower, even though I run a router that participates in routing and usually has 50+ or even 3 digit share ratios, with ~80 GB traffic a day in both directions, so it must be integrated well.

Now I realized I have only tried a single I2P torrent yet, and it was just 2 MB, and my experience was coming from both i2p sites and outproxies often being very slow or unreachable with the common tunnel settings.