The 'connection' between chimps and humans is asserted, based ONLY upon the chromosome count, and the assumed telomere reattachment.
40 years, you said...
Please do not dismiss this is a 'wall of text' meant to 'obfuscate', rather it is me showing a person with 40 years of evolution debate under his belt what he should have known starting more than 20 years ago regarding human-chimp affinities.
Protein sequence data:
Macromolecular Sequences in Systematic and Evolutionary Biology pp 115-191
Amino Acid Sequence Evidence on the Phylogeny of Primates and Other Eutherians
DNA hybridization of complete single-copy genomes:
J Mol Evol. 1990 Mar;30(3):202-36.
DNA hybridization evidence of hominoid phylogeny: a reanalysis of the data.
"Sibley and Ahlquist (1984, 1987) presented the results of a study of 514 DNA-DNA hybrids among the hominoids and Old World monkeys (Cercopithecidae). They concluded that the branching order of the living hominoid lineages, from oldest to most recent, was gibbons, orangutan, gorilla, chimpanzees, and human. Thus, a chimpanzee-human clade was indicated, rather than the chimpanzee-gorilla clade usually suggested from morphological evidence."
DNA sequence data:
Molecular Phylogenetics and Evolution
Volume 1, Issue 2, June 1992, Pages 97-135
Reexamination of the African hominoid trichotomy with additional sequences from the primate β-globin gene cluster
"Additional DNA sequence information from a range of primates, including 13.7 kb from pygmy chimpanzee (Pan paniscus), was added to data sets of β-globin gene cluster sequence alignments that span the γ1, γ2, and ψη loci and their flanking and intergenic regions. This enlarged body of data was used to address the issue of whether the ancestral separations of gorilla, chimpanzee, and human lineages resulted from only one trichotomous branching or from two dichotomous branching events.... Maximum parsimony analysis further strengthened the evidence that humans and chimpanzees share the longest common ancestry. Support for this human-chimpanzee clade is statistically significant at P = 0.002 over a human-gorilla clade or a chimpanzee-gorilla clade."
These are a mere three examples of literally thousands of such papers, easily searchable via Google Scholar - not to mention the dozens that employ the "Eve gene"...
Your claim that "The 'connection' between chimps and humans is asserted, based ONLY upon the chromosome count," is thus, handily and soundly, refuted.
Please do not ever make this claim - now known by you to be false - again.