as i read your post, i ponder why you posted that in on this blog? it has absolutely no relevance here. but since you have opened that can of worms. lets get to the root of the problems you had with dolphin. I truly do not believe it was a dolphin problem 100%, sure when you are working with new technology, you have glitches, and quirks that need to be worked out, but that is part of the program.
now, what i would like to know from you, where were you hosted, and with 78k members on a database, see more which i find hard to believe you had that on one database if you are complaing about speed. i think you had a network problem, not just your hosting provider, but your sysadmin, and your whole backend.
now i believe that a dolphin site with that number of members could absolutely work, but you would have to setup a network to handle that so you would attain a certain performance level. it seems you failed to plan on that. so that would be your downfall, not the script, the script has nothing to do with the capabilities of the performance of the machine you host it on.
good luck where ever you end up. enjoy life as its too short, and dont spend energy posting negatives when you could have done something productive with the time you spent posting on here.
now, what i would like to know from you, where were you hosted, and with 78k members on a database, see more