Another reference: "Design of wide-band CMOS VCO for multiband wireless LAN application" by N. H. W. Fong.
For varactor/moscap based switch cap, biasing voltage noise (LDO, current biasing) is a big concern. Try PXF simulation, and you will find the flicker noise upconversion gain is normally increased by 10dB.
Actually, well designed mimcap based switch cap has little effect on phase noise and its cmax/cmin (>4) is really higher than varactor based switch cap (<3). Q is not always the criterion for phase noise performance.
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Regards
Jason