Similar experience. Planted this spring from germination last August. Requires hand pollination. First fruit in October. Takes about 3 months from pollination to fruit drop. I haven't tried pollinating any since September though, since I'm not expecting them to hold any through winter. Some of the last pollinated fruits have started aborting, but that could also be due to massive caterpillar attacks also.
for me the purple edulis types also take around 3-4 months to ripen , I also always hand pollinate, thought have had fruit from flowers I did not pollinate. My fruits always ripen inside the house when I take my plants in for the winter, but I also quit hand pollinating them around middle of august ,since inside the house is too dark to have any fruit thats not very close to maturity ,be able to make it.
I also have flavicarpa's which are seedlings whom started flowering too late this year ,so i'll have any reviews regarding fruiting next summer.
Quite interesting. I didn't have much success with them, summer here it's too hot and the purple doesn't grow well. In spring/autumn the do well. I had few grafted and planted them in ground, now they are 5m long, too bad they need to die soon.