It is all true. I am unbiased to admit demographics are younger for our ancient traditions, irregardless of language or eastern or western rites.
The majority of latin masses, ordinary, extraordinary…more traditional liturgies of any sort do have younger people in them, quite true.
As many people have pointed out before these are multiple reasons for this.
There is a generation gap factor. Youth see tradition with fresh eyes and no biases as some of the “baby boomers” did.
Also the amount of home schoolers and people having 8 children is obviously higher at the more traditional, more beautiful masses…So the self perpetuation is greater.
I do not fully understand the reasons but quite simply…it is timeless and going to be the wave of the future… whatever was wrong with masses in the earlier 20th century could not have warranted the degree of change that came out of the 1970s post vat II era, the post vat II era is proving itself to have been a trend, passing.
English will remain as a liturgical language but I would predict that by 2050 the difference between a vernacular and latin mass will be zero in terms of rubrics, smells and bells. We are again headed toward greater liturgical unity and purity according to all the under 45 year old seminarians and priests Ive met.