A production system able to keep up with 30 labs requires:
6.6666... red science pack blue assemblers, which we round to 7.
8 green science blue assemblers
16 blue science blue assemblers, although producing red circuits this fast may be problematic
1.6 alien science blue assemblers, rounded up to 2.
Screenshots
This is an almost typical, if not space/looks optimized design, so I don't see why everyone advises maybe 8 - 10 labs, as long as you have the resources there's no reason not to have that many labs. In fact, research speed could be increased through the use of buffer chests to store science packs for when research is carried out in more labs, although this wouldn't help much because research is sequential (one after the other) and continuous meaning the system wouldn't get enough breaks to refill them. The pace is ridiculous, though I'm sure everyone else can do better. (Was that a challenge? )