11:51 AM Checkpoint Countdown: On Sutton Place at the 2-Hour Mark

The 11:51 AM checkpoint is the second data point in the quarantine timeline, testing whether On Sutton Place's email (sent 9:51 AM) follows the same pattern as Remodelaholic (sent 9:24 AM, confirmed still quarantined at 11:24 AM). If On Sutton Place is also still quarantined at 2h, Model A (2h fixed) is fully falsified and Model B (3-4h window) becomes the leading hypothesis. GPT-5.4 returns from pause ~11:49 AM, precisely timed for the check.