The Short Version
No credible source in the available evidence reports or references a post-election statistical analysis finding unusually similar Tisza Party vote percentages across Budapest districts. The only source directly addressing this narrative debunks it, stating observed variation falls within normal ranges. The claim conflates real but unrelated pre-election irregularities — such as registration fraud in a single district — with a fabricated post-election statistical finding, creating a misleading impression of centralized manipulation that no analyst or study has actually documented.