Is it me or is it them?

For the past 2 weeks, I've been getting around 3-4 phone calls from various companies asking me to attend an interview. It's not that I'm annoyed by it but I applied for some of that jobs weeks if not months ago. Only lately they call me up. I should be flattered that they called me but I can't help to wonder, is my resume so unattractive that it did not catch their attention or are they just slow and inefficient?

Since I've already accepted an offer, I don't see the point of even meeting them for the interview. Who knows how long are they going to take before decided to hire me. If I wait, I could be unemployed once I leave my current company since I've already resigned. Furthermore, I'll be joining another company next week.

Then again, I really wonder what would happen had I decided to attend their interview. Could I be getting a better deals. It's possible, or it may be worse. Would their working environment be better? Again, it's possible. How nice would it be if we can make some predictions about the near future. Then we can at least know what to expect from it.