Unresponsive potential caterers? Smaller wedding getting less priority?

I emailed 5 different caterers for quotes, through their Contact Us feature on their websites. Each caterer has solid reviews.
Caterer 1 called me a couple weeks after I had initially reached out. She had such a wonderful energy, apologized for the delay, explained she had been on vacation. We had a quick chat, she emailed me to follow up, and ended with, lets touch base after x date! I emailed her a couple weeks after x date, and she hasn't responded to date. It's been more than 13 days. FH and I decided to remove her from consideration. I'm really surprised because our venue manager loves her.
Caterer 2 emailed me back within a day or 2 and got me a very specific quote. She has been very responsive.
Caterer 3 emailed me within a day or 2 with a generic, "We'll contact you soon!"
Caterer 4 and 5 have yet to respond at all, it's been a couple of days.

What has been your experience with the average response time from caterers, when getting a quote, booking a tasting, asking questions, etc? What was the guest count you gave? I always give my 80 person guest count, but the caterer is probably assuming our actual count will be 60 (calculating for 20% decline rate). Do you think caterers hold out for bigger weddings? My wedding is on a Friday and a year out, so I wasn't anticipating much "competition" with other weddings. I am not inclined to wait more than a week or follow up with a phone call because I don't want the added stress of a flaky vendor for my wedding!