Almost all of the smaller greens I recently purchased have some IR content. Two are 5 mW Leadlight clones, pot modded for xx mW, and there are the true DX30's. Best way I've found to "see" the IR without a meter is to place a 780 nm IR pass filter over the laser output and then take a video with an IR sensitive webcam (to make a webcam IR sensitive just requires removing the internal IR filter). If the laser is still emitting IR, the webcam will pick it up.
The aforementioned way appears to be an easy way to visually check the performance of an IR filter. For example, if I place an IR filter across the laser output followed by the IR pass filter, I can then "see" how much IR is still emitted by looking at the webcam video. The IR pass filter I use is an IR-78 Hoya filter, but the film from a 1.44 MB floppy disk can work in a pinch (although it may not be as effective).
The Novalasers IR cut filters significantly reduce IR emitted from the DX30's, but a small amount is still emitted. Just how much I won't know until my power meter arrives. Some webcam IR removed filters will also work, but they are much thinner than the Novas and may break when zapped with higher power greens.
The only green I have which shows NO IR output in the webcam is an original black Leadlight. I was never able to pot mod it for higher output, so it remains <=5 mW. Maybe the low output is the reason all of the IR appears to be blocked.
HTH,
Jon