Yes, it is similar to the Gallician Chant. Yes, that particular choir and its director are slow paced. I was taught to lead the chant at a quick pace. I think that those whose families came from the Presov regions of modern Slovakia, much closer to Gallicia, tended to sing faster than those of the Uzhorod 'school' in Transcarpathia, modern Ukraine.
Thanks. I have heard Galician Chant a few times only visiting Ukrainian Catholic Churches and the pace is very slow here in Canada. But when you visit a church in Galicia such as in Lviv, the pace is a bit quicker but still not what I am used to in the Orthodox Church with Kyivan Chant. Also the CD's of their church choirs sing at a quicker pace.
Maybe the Ukrainian Catholics in Canada preserved an older tradition especially on the prairies when they came in 1891.
Nice to know that in the USA, the Carpathian traditions are preserved and used on a regular basis.
Just a guess, I really don't know enough on the topic.