> there isn't much to do with the sentiment

I see what you're saying but I think a more charitable interpretation can be made. They may be amazed that so many bug reports are being generated by such a reputable group. Looking at your initial reply, perhaps a more constructive comment could be one that joins them in excitement (even if that assumption is erroneous) and expanding on why you think it is exciting (e.g. this group's reputation for quality).