What is the consistency of cytosol?
Cytosol is actually about as viscous as water 
(i.e. ~1 cP or 1 mPa/s).

From the Introduction of Bicknese et al. 1993


  In fibroblasts and several types of epithelial cells, fluid-phase viscosity was 1.1-1.5 cP, not much higher than that of water (1 cP) (Periasamy et al., 1992). Recent measurements of cytoplasmic viscosity in CV1 and PtK1 cells by a novel ratiometric method supported the conclusion that fluid-phase viscosity in bulk cytoplasm is similar to that of water (Luby-Phelps et al., 1993). 


And from the conclusion:


  Apparent fluid-phase viscosity near the cell plasma membrane was 1.1 ± 0.2
  cP (fibroblast) and 1.0 ± 0.2 cP (MDCK), not significantly different from the viscosity measured in bulk cytoplasm far from the
  plasma membrane.


Interestingly, the paper cites the following studies: 


  In fibroblasts, fluid-phase viscosity was weakly temperature-dependent (Arrhenius activation energy 3-5 kcal/mol) and nearly independent of cell volume (Fushimi and Verkman, 1991).




Note: 

cP = centipoise


A centipoise (cP) is a non-SI (non-System International) measurement unit of dynamic viscosity in the centimeter gram second (CGS) system of units. It is multiple of the CGS base viscosity unit named poise (P)
1 cP = 0.01 g/cm/s
1 cP = 1 mPa/s




Source:

Bicknese S., N. Periasamy, S. B. Shohet, and A. S. Verkman. 1993. Cytoplasmic Viscosity Near the Cell Plasma Membrane: Measurement by
Evanescent Field Frequency-Domain Microfluorimetry. Biophysical Journal 65: 1272:1282



Further Reading:


Beals et al 1999
Gyurov &amp; Token 2011
Guthrie &amp; Nettesheim 2012
Kalwarczyk 2011