By its very definition, hyperbole is never honest. That, however, doesn’t mean it’s interesting (or worth mentioning).
If you genuinely think that the most remarkable thing about your agency is that you’re responsive, then fair doos - go ahead and remark upon it. It’s not exactly exciting (and one would like to hope that any agency worth its salt would be responsive) but if that’s the first thing you want to say about yourselves to a new prospect, then fill your boots.
You will, however, then have to ensure that you are faultless in that attribute. If you EVER aren’t the most responsive agency in the world, well… now you just look silly (we’ve even had clients who didn’t bother to turn up to a meeting we’d slaved to win them, and shrugged it off as if it were of no importance). Responsive you say? Hmm…
Would it not be MUCH better to actually be the guys that are super-responsive rather than the ones that tell people about it? Now anyone in contact with you can experience how responsive you are rather than read all about it and then hope you are. Now you can replace that sentence on your site with something more meaningful (perhaps a great testimonial or a key result achieved).
Successful new business is about making lots of small improvements to the way cold prospects see you. When you stop listing things as remarkable (that any prospect would simply expect) then you suddenly free up lots of space to say things that might move the needle.
Oh and don’t even get me started on “on budget, on time”…