A new preprint by Witten et al. (arXiv:2605.28930, 2026) dissects the reported excess of z>5 protocluster candidates from JWST, finding that apparent tensions with Lambda CDM largely dissolve once methodological mismatches are corrected. The study reviews literature candidates at 5<z<9 alongside TNG-Cluster and TNG300 simulations (sample of massive halos tracked forward from high redshift). Key fixes include using virial-radius masses rather than summing stellar mass over 50 R_vir apertures, forward-tracking progenitor evolution instead of backward extrapolation from z=0 clusters, and incorporating cosmic variance plus protocluster mergers. Post-correction, 64% of candidates fall below 10^14 M_sun (proto-groups) and none reach Coma-like (>10^15 M_sun) status by z=0. This preprint (not yet peer-reviewed) highlights how early overdensities still mark extreme cosmic-web nodes that may accelerate reionization and boost cosmic SFR density. Related work in Nature Astronomy (2024) on spectroscopically confirmed z7-8 overdensities and MNRAS simulations of high-z halo assembly reinforce that selection biases in aperture mass estimates have inflated perceived abundances. The analysis exposes gaps in standard structure-formation models only if observers continue inconsistent comparisons; refined Lagrangian-scale selections could better isolate true cluster progenitors and early environmental quenching effects.