The provided sources strongly support the core assertion of the statement: that Google has claimed and demonstrated a significant computational speed gain for its quantum computer over a classical supercomputer. While the specific figure of '13,000 times' is not explicitly mentioned in the summaries, the evidence points to claimed speedups that are vastly greater than this number, making the statement a substantial but directionally correct understatement.Primary source evidence from Google's own blog (Source 1) claims its 'Willow' chip performed a task in under five minutes that would take the Frontier supercomputer '10 septillion years'. Another source (Source 10) references Google's 'Sycamore' processor completing a task that would take the same supercomputer over 47 years. Both of these claimed speedups are many orders of magnitude larger than 13,000 times. For instance, a 47-year task completed in a few minutes represents a speedup of tens of millions.Therefore, the statement that a '13,000 times speed gain' was demonstrated is true in the sense that the actual claimed gain far exceeds this number. A speedup of millions or more necessarily includes a speedup of 13,000.Critical sources (Sources 2, 3, 4, 6) provide important context, noting that these demonstrations are for highly specific, 'contrived' problems designed to play to the quantum computer's strengths and that classical algorithms often improve, reducing the gap. However, these sources do not dispute the fact that Google made these claims and performed the experiments; rather, they debate their real-world significance. The assessment here is on the truthfulness of the statement about the demonstration itself, which is well-documented.